Added overwrite protection to the save method for learning_results
Merge branch 'master' into fix_learning_results_save
BUG-FIX: axes._array_indices_generator was not reversing navigation_shape
Document new overwrite parameter and remove redundant (as it is done by numpy) extension code
Merge branch 'fix_learning_results_save'
BUG-FIX: Signal.get_current_signal was returnig a signal with data of type float instead of array
BUG-FIX: axes_manager._get_data_slice was broken. (This fix was borrowed from one of Alberto's branches)
Merge branch 'master' into threshold_line_plot