[Downloader] Updated style of data directory selection
Merge remote-tracking branch 'GitHub-Vilarion/feature/gradle' into feature/gradle

Conflicts:
	illadownload/src/main/java/illarion/download/gui/GuiApplication.java
[Downloader] User directory and view selection

- The page to select the user directory is implemented now
- The selection of the pages to display is working now
[Downloader] Improved directory controller implementations
[Download] Setup controller for main view
[Download] Improved maven downloader
[Downloader] Update quest box title
[Downloader] Update title pane padding to fit frame gfx