talkatu/talkatu

Add support for rendering basic HTML in TalkatuHistory.

2021-01-25, Gary Kramlich
0a9e000e7d0f
Add support for rendering basic HTML in TalkatuHistory.

* Remove the data argument from class methods
* Renamed TalkatuHtmlParser to TalkatuHtmlRenderer
* Created TalkatuHtmlPangoRenderer
* Use the TalkatuMessage::content-type to determine how to render the text in
TalkatuHistory.

Testing Done:
Tested in the demo with a hack for the content type that will be fixed in a later review request.

Reviewed at https://reviews.imfreedom.org/r/403/
# Building
Talkatu uses [meson](https://mesonbuild.com) as it's build system.
Meson requires you to build in a directory other than the source directory.
To compile you can use the following commands:
```
meson build
cd build
ninja install
```