Add EDSSpectrum Signal
Merge branch 'ENH_rpl_INCA' into NEW_edsSpectrum
Merge branch 'master' into NEW_edsSpectrum
EHN calibration_on Copy the calibration and all metadata of a reference

Needed to calibrate INCA ripple
Merge branch 'ENH_spectrum_3D_dimension' into NEW_edsSpectrum
EHN background image spectrum for 2D

add manually in plot() a background
Merge branch 'ENH_background_for_plot' into NEW_edsSpectrum
EHN background image spectrum for 2D

add manually in plot() a background
Merge branch 'master' into NEW_edsSpectrum
Merge branch 'ENH_background_for_plot' into NEW_edsSpectrum

Conflicts:
	hyperspy/signal.py
Merge branch 'ENH_max_min' into NEW_edsSpectrum
Merge branch 'master' into NEW_edsSpectrum
EHN elements dictonary for EDS

add a dictionnary and modified add_elements
EHN: implementation of EDS_TEM and EDS_SEM

to_EDS('SEM'), read param in original_parameters,
set_microscope_param with ui
EHN creation of subclasses EDSSEMSpectrum and EDSTEMSpectrum

adapation of set_microscope_parameters, get_calibration_from, msa
EHN add_elements and plot_intentisity_map

Build the function to add and set the elements and line. Using it the
itensity map are plotted.
Merge branch 'NEW_edsSpectrum' of https://github.com/pburdet/hyperspy into NEW_edsSpectrum
EHN: background for stack of image.

Test in plot works but not plotting
EHN link_standard, top_hat, and k-ratio

First version for spectrum
Merge branch 'master' into NEW_edsSpectrum