Update documentation for CasperJS helper methods.
Rename CasperJS variable file.
Update documentation for variables.
DS-337 Output secondary_call_to_action if set
Update documentation for Drush and PhantomCSS scripts.
Explicitly compare generated diffs.

PhantomCSS was sometimes skipping running visual tests. Explicitly
giving an array of tests seems to fix this issue.
Merge pull request #3108 from DFurnes/test-docs-and-phantomcss-bug

Test docs and phantomcss bug
DS-337 Outputs facts, solutions, value_proposition if value_proposition is set
DS-424 Implements hook_forms to render multiple signup forms on pitch page
Pass array of ids per #3109 comments
Merge pull request #3109 from aaronschachter/pitch_updates

Pitch Page updates