added server source to python side plotting API
adding server data source to collections
misc bugfixes
Merge branch 'feature/plots_without_data' into feature/bigdata_lineplots
plot should only set initial range if the values in the ranges are sane
server data source
server source example
Merge branch 'feature/plots_without_data' into feature/bigdata_lineplots
Merge remote-tracking branch 'origin/master' into feature/bigdata_lineplots
Merge branch 'feature/plots_without_data' into feature/bigdata_lineplots
broken plotting when data sources are passed in
Merge pull request #456 from ContinuumIO/feature/bigdata_lineplots

Feature/bigdata lineplots