MapView.removeSensor() - fixed dict.pop key error
timeseries.py:
- QgsTasks report progress on time difference
- QgsTasks run cleanup

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

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

fixed about- and changelog doc issues
modified CONTRIBUTORS.rst

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

added context menu shortcuts

modified bitbucket-pipelines.yml

EOTimeSeriesViewer:
- added / modifed QgisInterface actions

mapvisualization.py:
- modified context menu of MapViewLayerTreeViewMenuProvider
- MapView: added currentMapCanvas logic

create_plugin.py: added option -z --zipfilename to create none-generic plugin zipfiles

refactoring

mapvisualization.py:
- refactored QGIS syncing

EOTimeSeriesViewer:
- added close()
- added setCurrentSource(TimeSeriesSource)

timseries.py:
- fixed sensor mockup in SensorInstrument
- reorderer classes
- speed-up TimeSeries.showTSDs()
- implemented TimeSeries.findSource(...)
- TimeSeriesTreeView context menu can be used to open selected source images in QGIS

create_plugin.py:
- added example directory to plugin folder

eotimeseriesviewer/ui:
- cleanup icons
- modified qgsMapCenter.svg

revisited and renamed scripts
updated bitbucket-pipelines.yml
refactored unit-tests
added .coveragec
renamed CHANGELOG to CHANGELOG.rst