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

timeseriesviewer/__init__.py: loads QGIS resources on start (for dev environments), added workaround for PyQtGraph issue 774,
timeseriesviewer/__main__.py refactored

mapvisualization.py fixed renderer export

added resourcemockup.py

utils.py improved qgis app initialization, added QgsPythonRunner implementation (for testing)

metadata.txt, pb_tool.cfg, make/deploy.py: refactoring, qgis min/max version by QGIS_MIN / QGIS_MAX

fixed DTG parsing from ENVI header
recognizes YYYY as date

stacked image import preserves ColorTable and CategoryNames information (from first input stack band)

mapvisualization.py renderToXml now uses in-memory VRT as dummy VRT

utils.py createQgsField extended to other types of numpy floats
timeseries.py fixed verifyInputImage

fixed Temporal profile expression evaluation

added SpectralLibraryTableFilterModel

SpectralProfile inherits QgsFeature
SpectraLibrary inherits QgsVectorLayer

improved rendering dialog (WIP)

profile visualization: fixed TP loading status, added TP ContextMenu

fixed Issue #42

refactoring

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)

virtualrasters.py : added feature identify to preview map

added classificationscheme.py
utils.py added value2str
added vrtbuilder.ui
virtualrasters: multiple changes (in progress) related to vrtbuilder.ui

refactoring

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)