Fix Python files to comply with PEP8 1.5.0
Merge pull request #85 from sbesson/pep8_150

Fix Python files to comply with PEP8 1.5.0
Change legacy to previous versions
Minor tidying of mtools page
Adding subsection links & legacy -> previous
Merge pull request #88 from hflynn/previous

Change legacy to previous versions
mtools -> OMERO.mtools
Merge pull request #89 from hflynn/mtools-tidy

Minor tidying of mtools page