Fix Python files to comply with PEP8 1.5.0
Merge pull request #86 from sbesson/rebased/develop/pep8_150

Fix Python files to comply with PEP8 1.5.0 (rebased onto develop)
Change legacy to previous versions
Merge pull request #91 from hflynn/rebased/develop/previous

Change legacy to previous versions (rebased onto develop)
Minor tidying of mtools page
Adding subsection links & legacy -> previous
mtools -> OMERO.mtools
Merge pull request #92 from hflynn/rebased/develop/mtools-tidy

Minor tidying of mtools page (rebased onto develop)