BUG-FIX: the hydrogenic xs were raising an exception when Z<13 and Z>36 because Egerton's original code was not designed to work out of this range
Add correction factor parameters for Na and Mg to the Hydrogenic XSs so that they better match HS XSs
EHN: add mass absorption
EHN: tidy up element_EDS
EHN: litterature
SUP: suppress all mass absorption coefficient
Add model.get_component. Finding a component by name in a model

Useful when Hyperspy is called a library, since the components are
not directly callable.
ENH: suppress all the remaining plot_intensity_map
DOC: parameters
DOC: describibg sample
DOC: EDS plot
DOC: gte lines intensity
Fixes #175 , plotting line spectra was raising an exception.
Merge branch 'master' into DOC_improved_EDS
Rename get_component -> __getitem__ .
Merge pull request #2 from francisco-dlp/model_get_specific_component

Rename get_component -> __getitem__ .
Change component.name to property: check for duplicate when namechange

If the component is a part of a model, and the name of the model is
changed, the component will check if there are any components with
the same name.
Change model.append behavior: checks for duplicate component names

If a component with the same name already exists, the name will be
add _0, _1, _2, ...
If the component has no name, it will get the same name as its
_id_name: "Gaussian", "Voigt",...
Merge branch 'master' into DOC_improved_EDS

Conflicts:
	hyperspy/_signals/eds.py
	hyperspy/tests/signal/test_eds_tem.py
Change model.__getitiem__ behavior: check if components have same name

__getitem__ will now raise an error it finds several components with
the same name