Geany 2.0

What's new in this version:

General:
- Split "session data" into session.conf, preferences are written to and read from geany.conf
- Add new build system Meson (experimental)
- Require GTK 3.24

Bug fixes:
- (Re-)Add ability to scroll over document tabs
- Fix keyword colorization on filetype change
- Fix startup files order when placing tabs next to the current one

Interface:
- The document list in the sidebar has a new tree view. This mode is the new default and existing installations automatically use it
- Use dark-theme friendly colors for compiler messages
- Add a confirmation dialog on search & replace for the whole session
- Filter entry for symbol tree
- Simplify project creation from existing directories with sources
- Add option to show symbols in symbol tree without category groups
- Add option to only show line endings if they differ from file default
- Make tab label length and window title length configurable
- Make Go to Symbol commands show signature list

Editor:
- Update Scintilla to 5.3.7 and Lexilla to 5.2.7
- Add "Change history" feature (disabled by default)

Filetypes:
- Sync many parsers from the Universal Ctags project, this leads to updated symbol parsers
- Improved support for the ctags file format, which is now the recommended format for tags files
- Update Kotlin filetype config
- Apply Markdown header style to the complete header
- Update Nim filetype config
- Update PHP filetype config
- Update Python filetype config
- Add AutoIt filetype
- Add GDScript filetype
- Remove Ferite filetype
- Enable local variables and improve autocompletion for C/C++ and some other languages

Windows:
- Remove native file and color dialogs on Windows, GTK dialogs will be used instead
- Use "Prof-Gnome" GTK theme by default (same theme as used on macOS) for a better experience, the "Adwaita" theme can still be activated

Internationalization:
- Updated translations: cz, da, de, fr, es, kk, lv, it, nl, pt, sk, ru, ua
- Added translations: si