Add Hound CI configuration

Enforce single_quotes
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Versioneye seems a bit undecisive about Gemfile and Gemfile.lock,
let's keep it simple.
Moved event planning to separate role.
Added missing associations for Event.
Delegating TimetableSlot conversion to EventFactory.
Primary key is required for #generate_events.
Added support for multiple matching_attributes in Sync.
Events are synced correctly.
Added semester and fetch_all parameters to UpdatedParallelsFinder.
Using ImportUpdatedParallels interactor in ScheduleManager.
Missing requires.
Increased default student pagination size.
Extracted faculty and semester as attributes.
Removed unused methods from ScheduleManager. Added import_students method.
Add Pliny
Add Pliny dependencies
Add files from Pliny template
Move VCR to spec support
Add spec log support
Use Pliny spec helper