Merge pull request wordpress-mobile#51 from wordpress-mobile/release-…

…1-5-1

Release 1.5.1

Merge pull request wordpress-mobile#49 from wordpress-mobile/release-…

…v1-5

Release version 1.5

Merge pull request wordpress-mobile#41 from wordpress-mobile/issue/bu…

…mp-version-1-4

Bump to version 1.4

Bump to v1.3.0 for release