add rendering hints service
add category as object
fix marker selection problem after category refactoring
add StatusIntervalsService to TimeseriesOutputAdapter
perameterize rendering hints
Merge pull request #110 from janschulte/develop

timeseries-api updates
fix: rendering hints also for a collection of timeseries possible
status interval for timeseries item request
Merge pull request #111 from janschulte/develop

small fixes
add irc notification
Merge remote-tracking branch '52North/develop'