BF: do not rely on running tests from tests/ (Close #10)
ENH: Just for fun enabling "setup.py test" via setuptools
ENH: added emacs/vim modelines, removed trailing spaces, tabified indentation with tabs

there is still 2 files using 4 spaces (good files!) for indentation, while the rest
is indented with 2
ENH: adding travis and coveralls setup

It squeezed following commits:

ENH: install nibabel (and remove installation of not needed gamin)
BF(travis): easy_install is unversioned
travis -- no Python matrix, use system-wide modules, install scipy (numpy) and nibabel from pkgs
ENH: smoke tests for the MetaAnalysis and its save_results