wearable data fetching
added datamap conversion for lecture list (unused at the moment)
fix lecture start and end times
lecture colors - moved code into util class
lecture data processing (on wear device)
pulled Lecture into own class; small refactoring of LectureGridPagingAdapter
app: update single lecture on change of highlight state for wear
wear data display
app: fix exception - id is string
wear lecture display
lecture sorting
small bugfixes and ui design changes
fix order of upcoming lectures
i18n