Add localization library
Add localization file lexer

Just wrote it now, so it may have some fringe case bugs in it.
Update translation library

Fixes one-way bindings
Add string ReplaceAt extension
Add translation hints to all UI windows
Add English translation file
Attribute translations to their authors
Fix missing TranslationExtension file (wasn't being added to repo for some reason)
Provide links to authors' websites in about page
Allow testing of translations by placing *.slt files in current directory
Added Metro Icons
Add current language setting
Solve issues with loading translations from files
Update MainWindow

Adds a language selection panel and swaps all menu items for icons
instead of text (makes them easier to understand for users in other
languages).
Allow translation manager to be forced to reselect the best available language
Merge pull request #47 from Mpstark/feature/localization

Full Localization Support