Merge branch 'hotfix/1.1.2'
reading files with binary mode. this fixes an issue on windows.
fixes issue #189
Merge pull request #190 from davidbrai/master

Read files in binary mode to avoid windows file reading issue.
Merge branch 'release/1.2'

Conflicts:
	compressor/filters/css_default.py
Merge upstream commits
moved CompressorNode class and mixin out of the compress.py module
Moved CompressorMixin and CompressorNode to
compressor.templatetags.utils.__init__ to avoid circular imports
Added some backwards compatibility for users who import CompressorNode
in their code already.