fixed bug in vector layer visualization
pulled qps updates

.gitignore knows enmapboxtestdata
fixed several missing references

fixes issue #76 - uses original QGOS raster renderer widgets only (to be improved)

- 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 example/inmemorydatasets.py

MapCanvas: used MapCanvasLayerModel that support lazy loading of QgsMapLayer instances
MapViews can have individual vector layer sources for overlay

mapvisualization: fixed several optical issues, connected buttons

fixed labelSummary text update

UI fixes

improved QGIS interaction
several UI issues and smaler bugs fixed

TsvMapCanvas::stretchToCurrentExtent stretches QgsSingleBandPseudoColorRenderer