update release number
BUG-FIX: overwrite was not displaying the right message when running in terminal that without  support for raw_input
BUG-FIX: exporting bss and decomposition was raising an exception
Add a __repr__ method to Model
Rename navigation/signal_indixer to inav/isign
The method that remove a signal axis now modify record_by accordingly
New MPL_HyperExplorer class that contains all that is common to MPL_HyperImage_Explorer and MPL_HyperSpectrum_Explorer