Created package-structure with included database

- packages have to have the ending .pspkg,
- database is located in *.pspkg/database/database.psdb
Opening last used packages should be working now
Adding photos to package works
WIP: Widget to show photos
iPhoto-style to show photos
Visualization of photos corresponding to a game
Added auto-identify of photos
Added infos to identify rounds from photos easier
Merge branch 'master' of github.com:lbproductions/psnewmodel
Release 0.0.3
Fixed bug with reopening PhotoWidget
PhotoWidget updates if new photos are added to the package
Increased image-loading-performance
Added skip-function and default player to AddPhotoDialog
Last used directory is now default location in QFileDialog to select photos
Release 0.0.4
Merge branch 'refs/heads/master' into dev

Conflicts:
	src/data/round.h
Auto fix UNIQUE constraint in relation tables.
Finished fixing the database.