Added test for TimetablePrinter class
General project settings changes.
Merge branch 'master' into testbranch
Added log config to TimetablePrinterTest.
Removed unused parameter to constructor of TimetableState class.
Fixed small error in Group class - changed NULL to null.
Fixed number of small number of bugs in Group.java.
Fixed a null pointer bug in Group class.
Added TODO note in InterviewTime class. Fixed bug in TimetablePrinterTest.
Updated logs.txt.
Merged testbranch changes into master (needed to remove test files).