Implemented Organizer base class.
Pipe is now a Class.
Moved [] operator to Organizer.
Changed Splitter from module to class as well.
Added Aliases module to Interpipe.
Merge branch 'master' of github.com:cvut/sirius
Aliases spec improved.
Aliases methods now return respective classes instead of delegating directly.
Merge branch 'master' of github.com:cvut/sirius
Partially implemented parametrized Sync Interactor.
Removed unused .split and .pipe methods.
Sync saving logic implemented.
Re-implemented Parallel conversion with Interactors.
Created Interactor for TimetableSlot conversion. (WIP)
Implemented overview pipe for importing changed parallels.