Updating Selenium versions (new Firefox 29 breaks older version).
Working on MC-236. Added default value to parameter in createPathway function
Swapping out getNode for dynamically updating version
Making optional elements marked as such and adding wait for AJAX node selection
Fixing typo in waitFor
Merge pull request #5 from ModelCatalogue/feature/MC-236_travis_fix

3 clean builds in a row!