Fixed issue #238
Merge pull request #239 from umby24/master

Fixed issue #238
Merge pull request #242 from fragmer/master

Fixed #241 Screenshots in singleplayer are saved to folder named "Generating level"
Fixed a number of issues in TextureSelectionScreen: [Load file] button now works (fixes #240), file extensions are no longer case-sensitive, improved error reporting and logging, added an indication of currently-selected texture pack, and added a hint when over 5 texture packs are detected.