refactoring PixelLoader. in case of image intersection, overlapping Geometry is truncated to image bounds

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

refactoring

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

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 PixelLoaderResult(object)
adjusted TSV icon
changed test_pixelloader.py

fixed smaller bug in pixelloader

DateAxis
ProfilePoint
test cases