fixed Temporal profile expression evaluation

TemporalProfileCollection is now an in-memory TemporalProfileLayer(QgsVectorLayer)
added TemporalProfileTableModel, TemporalProfileTableFilterModel, TemporalProfileFeatureSelectionManager, TemporalProfileTableView

added @qgsfunctions plotStyleSymbolFillColor and plotStyleSymbol. this allows to synchronize th eplot visualization with the layer visualization of the Spectral Library

added default spectrum for spectral libraries

improved speclib CSV export

Speclib MIMEDATA Handling

added ClipboardIO(AbstractSpectralLibraryIO) to write/read Speclibs from Clipboard

added SpectralLibraryTableFilterModel

SpectralProfile inherits QgsFeature
SpectraLibrary inherits QgsVectorLayer

fixed issue #54 "Spectral library: Cancelling Set color dialog causes reset of previous color to black/none"

spectrallibraries.py: added setAddCurrentSpectraToSpeclibMode(), fromMapCanvas(mapCanvas, position) can read data from invisible mapcanvases

icons for doc are now fetched directly from ui folder, added missing panel descriptions, edited installation guide, added favicon, added news