Merge pull request #1 from disko/master

Remove all certificates and extra handling for PyPI validation.
Freeze Scss due to incompatibility

pyramid-scss==0.2.1 and pyScss==1.1.5 looks incompatible
Fix link to pypiserver
fixed error, when serving local packages
Merge pull request #3 from fizyk/master

Check if url is set on ReleaseFile
Reorder alternatives
Release 0.7.4
Fix documentation (grammar)
Fix documentation
Package name of pyramid-scss is pyramid_scss