Fix a few typos
Documentation tweaks, the main ones being:
* replace ipython --pylab by ipython --matplotlib since the former is discouraged and it does not look like the doc is using functions that --pylab is importing in the main namespace
* EPD has been replaced by Enthought Canopy
Missing dot
Move the note about the --matplotlib flag after showing how the interactive prompt looks like
Replace another ipython -pylab usage by ipython --matplotlib
DOC: no mean EPI image computation any more in plot_canica_resting_state.py
Also fixed typo
DOC: fix end-before and start-after targets
DOC: fix broken link targets
DOC: remove mentions of numpy masked arrays that are no longer relevant
Remove unused numpy masked array in plot_ica_resting_state.py
DOC: fix link targets
DOC: fix typo
DOC: plot_haxby_simple does face vs cats (and not houses)
DOC: display_mask is not used to plot the mask in plot_mask_computation.py
DOC: fix typo
DOC: fix link target and end-before target in plot_haxby_anova_svm.py
DOC: only mention NiftiMapsMasker since the content is under the "NiftiMapsMasker usage section"
Fix typo
Rename _utils.fast_maths to _utils.extmath
Move is_spd from _utils.testing to _utils.extmath
Add tests for is_spd.
* test_fast_maths.py has been renamed to test_extmath.py
* Only use relative tolerance in is_spd to check that the matrix is symmetric