Add plotting RGB(A) image stacks
RGB image files are now read with the RGB dtype and can be plotted
Updrade tifffile to version 2013.05.02
Add reading and writing RGB tiff files and improve. In addition the axes names and tags of tiff files are now read where possible
Merge branch 'master' into ENH_plotRGB
Disable colorbar when plotting RGB
BUG-FIX: when writing to tiff the photometric tags was not properly set what was causing problem on loading (reported by P. Burdet)
Add uint <-> RGB conversion to change_dtype
Add RGB tests
Merge branch 'master' into ENH_plotRGB

Conflicts:
	hyperspy/drawing/image.py
	hyperspy/signal.py
BUG-FIX: conversion to RGBA was failing for non-contiguous arrays
BUG-FIX: RGB16 images were not plotting properly
Merge master
Automatic style corrections courtesy of autopep8.
added variance passing with signal inav and isig views
Automatic style corrections courtesy of autopep8
ENH: integrate_in_range out of place
DOC: some docs
Merge branch 'master' into ENH_Integrat_in_range_out_place
DictionaryTreeBrowser.add_dictionary was deleting the content of nodes that already in the tree.