test_images tests now pass

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branch : compat_win
Updated tests generation to cope with win32's separator

--HG--
branch : compat_win
Fixed make_filename_hash on windows

--HG--
branch : compat_win
Merge with changes from Kronuz repo

--HG--
branch : compat_win
Merge remote-tracking branch 'Kronuz/master' into compat_win
Merge remote-tracking branch 'Kronuz/master' into compat_win
Replaced codecs import by io for python 2

(had line break issues on win32)
Six install in the package dir is not necessary anymore

Scss module does not need to be imported to load the variables from scss.scss_meta
Adds requirement for enum34 if python version is < 3.4
Adds tox file
Win32 / Py3 compat
py26 compat
Merge pull request #302 from tkhyn/compat

Compatibilty (windows, python versions)