Merge branch 'release/1.3.8' into develop
Merge branch 'hotfix/update-changelog' into develop
Fix bad interaction with Git submodules.  Fixes issue #111.
Merge branch 'graphitedigital-master' into develop
Update podspec to version 1.3.9
Merge branch 'release/1.3.9'
Update changelog for version 1.3.9
Merge branch 'hotfix/update-changelog'