Add failing tests for 3 new cases we encountered in production
Rework file-sequence parsing to accept /0001.exr, /file_0001_exr and /file.exr
Test for case where a fragment of the sequence path matches the regex for splitting-on-frameID
Force the frameID to include at least one # or @ character
Merge pull request #12 from donalm/ssub

merging.  I asked Justin to do a release for us.