Update tests to check for old builds in a matrix
Only keep matrix runs which match the current build number
Flake 8 fixes
Use = instead of == for string comparisons
Merge pull request #43 from manics/multiple_build_numbers

Ignore old build numbers in matrix builds
Relax requirements on yaclifw (use greater than rather than equal)
Merge pull request #44 from sbesson/yaclifw_gt

Yaclifw requirements