Update changelog and fix some docs

Changelog.md

@@ -1,5 +1,58 @@
 # Changelog
 
+## v0.20.0
+
+*Soon*
+
+This release comes with a completely new ui, including a dark theme!
+Additionally there are some other minor features and bug fixes.
+
+- New Web-UI with a light and dark theme (#293). 
+  - All markup and css was reworked. For this release, the old ui is
+    still available as a fallback if something got missing while
+    porting. The old ui will be removed in the next release.
+  - Experience on mobile devices is greatly improved
+  - to get back to the old ui, you need to install a browser extension
+    to be able to add a request header. Check [this for
+    firefox](https://addons.mozilla.org/en-US/firefox/addon/modheader-firefox/)
+    or [this for
+    chromium](https://chrome.google.com/webstore/detail/modheader/idgpnmonknjnojddfkpgkljpfnnfcklj)
+  - then add the request header `Docspell-Ui` with value `1`.
+    Reloading the page gets you back the old ui.
+- With new Web-UI, certain features and fixes were realized, but not
+  backported to the old ui:
+  - foldable sections in search and multi-edit menu (#613, #527)
+  - show current item in detail view (#369)
+  - fixed some ui issues regarding processing logs (#363)
+  - scrollbar fix (#600)
+- Allow a person to be correspondent, concerning or both (#605)
+- Add a short-name field to the organization (#560)
+- Add a description field to the equipment (#633)
+- Allow to specify a language for a source url (#651). This can be
+  used to define upload urls per document language.
+- Trim whitespace for certain fields (#539)
+- A different docker entrypoint for the consumedir script was added
+  that supports polling (thanks @JaCoB1123, #603, #624)
+- Fix duplicate suggestions (#627)
+- Fix reading mails with empty headers (#606)
+- Fix suggesting person that doesn't belong to the suggested
+  organization (#625)
+- Cleanup registered nodes periodically (#618)
+
+### REST Api Changes
+
+- The `Person` structure was changed: the `concerning` boolean flag is
+  replaced by a `use` attribute
+- The `Equipment` structure has an additional `notes` attribute
+- The `Source` structure has an additional `language` attribute
+
+### Configuration Changes
+
+- joex: 
+  - additional section in `house-keeping` to configure the periodic
+    node cleanup task
+
+
 ## v0.19.0
 
 *Jan 25, 2021*

website/site/content/docs/faq/_index.md

@@ -14,7 +14,7 @@ mktoc = true
 Everything, including all files, are stored in the database.
 
 Now that seems to put off some people coming to Docspell, so here are
-some thoughts on why this is and why is may be not such a big deal. It
+some thoughts on why this is and why it may be not such a big deal. It
 was a conscious decision and the option to hold all files in the file
 system was considered, but not chosen in the end.
 
@@ -36,7 +36,7 @@ were the reasons for the current decision:
   system used by the application and not two which reduces complexity
   in the code.
 - Consistency: Both "databases" (filesystem + relational db) can
-  easily get out of sync and this will break the application. It's
+  easily get out of sync and this will break the application. It's a
   very strong plus to be able to rely on the strong ACID guarantees of
   database systems.
 - Distributed/Scaling: One goal is to run Docspell in a distributed

website/site/content/docs/features/_index.md

@@ -31,9 +31,12 @@ description = "A list of features and limitations."
   [REST Api](@/docs/api/_index.md); allows to [generate
   clients](https://openapi-generator.tech/docs/generators) for
   (almost) any language
-- mobile-friendly Web-UI
-- [Create “share-urls”](@/docs/webapp/uploading.md#anonymous-upload)
-  to upload files anonymously
+- mobile-friendly Web-UI with dark and light theme
+- [Create anonymous
+  “upload-urls”](@/docs/webapp/uploading.md#anonymous-upload) to
+  upload files; these urls allow to be configured with metadata like
+  tags, folder etc that are applied to all files uploaded through this
+  url
 - [Send documents via e-mail](@/docs/webapp/mailitem.md)
 - [E-Mail notification](@/docs/webapp/notifydueitems.md) for documents
   with due dates

website/site/content/docs/install/prereq.md

@@ -18,11 +18,14 @@ package manager or see [this site](https://adoptopenjdk.net/) for
 other options.
 
 It is enough to install the JRE. The JDK is required, if you want to
-build docspell from source.
+build docspell from source. For newer versions, the JRE is not shipped
+anymore, simply use JDK then.
 
 Docspell has been tested with Java version 1.8 (or sometimes referred
-to as JRE 8 and JDK 8, respectively). The pre-build packages are also
-build using JDK 8. But a later version of Java should work as well.
+to as JRE 8 and JDK 8, respectively). The pre-build packages are build
+using JDK 8. So at least a JDK/JRE 8 is required. However, it also
+works on newer java versions, I recommend JDK 11 as this has better
+default options. The provided docker images use JDK11, too.
 
 The next tools are only required on machines running the *Joex*
 component.

website/site/content/docs/joex/file-processing.md

@@ -10,8 +10,8 @@ mktoc = true
 When uploading a file, it is only saved to the database together with
 the given meta information. The file is not visible in the ui yet.
 Then joex takes the next such file (or files in case you uploaded
-many) and starts processing it. When processing finished, it the item
-and its files will show up in the ui.
+many) and starts processing it. When processing finished, the item and
+its files will show up in the ui.
 
 If an error occurs during processing, the item will be created
 anyways, so you can see it. Depending on the error, some information