Release Candidate for Version 2.1

Final-ish version 2.0

This is the 2.0 version including all changes that are required to make working with TranslationHelperProjects a possiblity.
What's left is making the UI look a little more pretty and getting UI tests into a state where they give meaningful results again.
As such this is an "almost-stable" release, with no guarantees for anything.

v2.0 Release-Candidate

The v2.0 Release Candidate includes the new features:
- Projects
- JavaFX-only GUI
- significantly worse error handling (namely none)
- A complete code-restructuring that should make adding new features easier
- Proper unit-tests for everything but the GUI

Fixed Resize-Behaviour. Actually fixes #40

Release Version 1.0 - JavaFX UI

Fixed the bug in my run configuration that led me to think ResxChoose…

…r didn't work. Added a regression test. Fixes #25

Added TODOs for next issues, Minor reformattings and Cleanup, Adjuste…

…d Locale-Regex to support DE-AT and the like

Usable alpha version employing basic keybindings and simple highlight…

…ing. Only translates to German though