Add history support to the API.
Fix up JSHint errors.
Remove vendor prefixes and add Firefox support
Log error with Chrome<-->Firefox communication attempt
Fix createOffer and createOffer for Firefox
Fix createOffer and createAnswer for firefox
Merge pull request #2 from tskimmett/ff-support-new

Firefox Support Attempt 2
Update README file.
Fix connection not being present on subscribe issue.
Add in backfill and remove history call.
Fix up build script. Fix up linting errors.
Merge branch 'release/v0.3.0'