wip:3D expression evaluation

fixed umlaut problem

refactoring

pixelloader.py added dprint for debug printouts

fixed temporal profile visualization

added example/inmemorydatasets.py

smaller fixes in *.ui and mapvisualization.py
fixed deploy.py

profilevisualization: UI refactoring, UI title-updates, profile-request action connected with MapTool in main UI,
started to implemente saveTemporalProfiles actions

pixelloader.py - loads from valid band-indices only
profilevisualization.py - refactoring, added exampleLyr(sensor)
   several changes related to 3D plotting: added ViewWidget3D(), TemporalProfile3DPlotStyle(PlotStyle), PlotSettingsModel3D(QAbstractTableModel)

profilevisualization: date2num num2date now based on decimalyear values

SEVERAL CHANGES TO TEMPORAL PROFILE VISUALIZATION
+ dynamic data loading
+ free choice of TemporalProfiles
+ removed dependency to in-memory QgsVectorLayer

https://github.com/pyinstaller/pyinstaller/wiki/Recipe-Multiprocessing

utils.py refactoring (loadUi -> loadUI, affects many widget classes)

added cursorlocationvalue.py + panel
added spectrallibraries.py + panel
added a couple of new icons
added trees.py (basic TreeModel system)

TimeSeriesViewer inherits QgisInterface
refactoring maptools
 - added mapcanvas.MapTools
 - TimeSeriesviewer.onShowProfile handles location based maptool requests (CursorLocation, Temproal/spectral prpofiles)

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