Update database - add plans, slots and results
Merge remote-tracking branch 'regalis/dev' into dev
Add Doxygen configuration file
Add Graph class with basic methods and documentation
Update README's with information about building
Merge branch 'dev' into feature-csp
Minor change with groups of methods in Graph.hpp
Title change in README and add doc UML generation
Merge branch 'dev' into feature-csp
Base CSP data structures and beginning of CSP init
CSP global domain creation with colors consistency
CSP group slots domains creation
Rename group domain gen. to slots domain gen.

and following changes.
Basic version of plan generation from domains
Merge branch 'feature-csp' into dev
Merge remote-tracking branch 'slimak/dev' into dev
Merge remote-tracking branch 'ktalik/dev' into dev
Add MainWindow, update Classrooms and Props widget, add Subjects widget
Add first version of tests
Add column stretch to Classrooms, Subjects, update Subjects