TimeSeriesDatum: implements QAbstractTableModel, added .removeSource(...)

TimeSeriesDock shows datasources in a TreeView (better grouping)
TimeSeriesTreeView highlight TimeSeriesDates of visible MapCanvases

Signed-off-by: benjamin.jakimow <benjamin.jakimow@geo.hu-berlin.de>

simplified MapViews and lazy rendering

Signed-off-by: benjamin.jakimow <benjamin.jakimow@geo.hu-berlin.de>

Signed-off-by: benjamin.jakimow <benjamin.jakimow@geo.hu-berlin.de>

fixed bug in vector layer visualization
pulled qps updates

- added MapCanvasLayerModel, MapCanvas.Command, multi-raster-layer support
- implemented refresh pipeline for timed updates
- QMenu shows Crosshair visibility, fixed some api bugs
- added setSpatialExtent, setSpatialCenter
- spatialExtentHint considers all layers

TimeSeriesViewer:
- added showTimeSeriesDatum fpor scrolling to TSD of interest

TimeSeries + TimeSeriesTableModel + panel:
- support multiple raster per date
- QSortProxyModel allows sorting

utils.py
- added some more TestObject functions

make.py
- resource.py compilation is now python-only.
refactoring + docstrings

added WCS support
added TimeSeriesDataSource
allows to use multiple source per TSD

refactoring
added timeseriesviewertesting and moved tests to

mapvisualization.py renderToXml now uses in-memory VRT as dummy VRT

utils.py createQgsField extended to other types of numpy floats
timeseries.py fixed verifyInputImage