Added a picture of Martyna Dukowicz to the event's photos.
Merge pull request #13 from PjpG/hot/add_photos_to_event

Added a picture of Martyna Dukowicz to the event's photos.
Added datepicker to new and edit method of substitutes. Fixed bootstrap javascript error.
Updated substitutes datepicker initialization.
Merge pull request #14 from PjpG/fix/fixing_blank_substitutes_title

Added datepicker to new and edit method of substitutes. Fixed bootstrap javascript error.