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

.gitignore knows enmapboxtestdata
fixed several missing references

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

- Keys as shortcut to access EO TSV settings
- settings are restored during start of EO TSV
timeseriesviewer.settings.value(..., default=...) und .setValue(...) as counterparts to QSettings object
- added SettingsDialog

- 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

refactoring
added timeseriesviewertesting and moved tests to

Crosshairs: refactoring, unified per mapview, position remains on position of last mouse-click (closes issue #12)

startet implementatino of stackedbandinput dialog and required classes

added test/collapsibleGroupBox (idea: find a way to use QGIS resource icons without having QGIS started)

first steps to change MapViewCollection UI

added __main__.py (in progress)
added option to load center pixel automatically