added example/inmemorydatasets.py

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

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

improved QGIS interaction
several UI issues and smaler bugs fixed

sensors have a static id
sensors have a variable name (sensor.setName()). name changes are propagated to other components
sensor table view allows to change sensor name and shows wavelength information