Fixed BookUtilTest
WindowController now uses GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds() to get max Bounds
Merge branch 'master' of github.com:meip/slibrary
A very basic validation functionality
A very basic validation functionality
Validation for BookDetail added
A very basic validation functionality
Merge branch 'p1meier_first_validation'
Merge branch 'master' of github.com:meip/slibrary

Conflicts:
	gui/src/main/java/ch/hsr/slibrary/gui/controller/BookDetailController.java
	gui/src/main/java/ch/hsr/slibrary/gui/controller/WindowController.java
Optimized imports