Merge pull request #31 from javiercejudo/release-rev-manifest

Release rev manifest
Adds PHP script to backup firebase data
Merge pull request #33 from javiercejudo/s3-firebase-backup

Adds PHP script to backup firebase data. Closes #32.
Adds default timezone to firebase backup script
Bump version to 1.2.1
Merge branch 'master' into staging
Move gulp-bump to from devDependencies to dependencies
Upgrade the travis gem to 1.6.10
Upgrade grunt-karma-coveralls to 2.5.0