EHN: add mass absorption
EHN: tidy up element_EDS
EHN: litterature
SUP: suppress all mass absorption coefficient
Merge branch 'master' into mass_absorption_coeff

Conflicts:
	hyperspy/_signals/eds.py
	hyperspy/misc/eds/elements.py
	hyperspy/misc/eds/utils.py
ENH:databse merging
Automatic style corrections courtesy of autopep8
SUP: supress old databases
Automatic style corrections courtesy of autopep8
ENH: modify where database is used
Automatic style corrections courtesy of autopep8
Merge branch 'DOC_improved_EDS' into ENH_merge_elements_EDS_EELS
DOC: some doc in eds
ENH: Li Ka energy
Automatic style corrections courtesy of autopep8
BUG: all dictBrowser as dic
Automatic style corrections courtesy of autopep8
Merge branch 'DOC_improved_EDS' into ENH_merge_elements_EDS_EELS
Merge branch 'master' into ENH_merge_elements_EDS_EELS

Conflicts:
	hyperspy/misc/eds/elements.py
	hyperspy/misc/eels/elements.py
SUP: elements eds and eels