default colors for new sensor 2D/3D profiles different to existing sensor colors.

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

profilevisualization.py refactoring, added TemporalProfile.plot()

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

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)

added # -*- coding: uft-8 -*-   and  # noinspection PyPep8Naming to each module
added GPL License statement to each module
added from __future__ import absolute_import to each module

SensorPlotStyle get restored
PixelLoader.py: CRS transformation in pure GDAL due to problems with QgsCoordinateTransformation in non-main thread
utils.geo2px() now casts geo2pxF coordinates to integer (instead of rounding them)

added SensorPixelDataMemoryLayer

added PixelLoaderResult(object)
adjusted TSV icon
changed test_pixelloader.py

moved loadUIFormClass(jp(DIR_UI, p)) to utils.py and (yessss!) removed an error occurred with newline character in *.ui inline HTML

widget "under construction" will not be shown to the user

fixed smaller bug in pixelloader

use QTimer with 2000ms timeout interval to update on plot changes

added DateTimeViewBox
implemented sigMoveToDate, sigMoveToTSD and related context menu

PixelLoadWorker always returns 3D stack