Add MANIFEST template
Add MANIFEST template

By using this manifest template the sdist command will bundle all necessary files when building the distribution. 
Fixes #5
Reference: https://docs.python.org/2/distutils/sourcedist.html#specifying-the-files-to-distribute
Blueshoe/djangocms-layouter,Blueshoe/djangocms-layouter,Blueshoe/djangocms-layouter