Merge pull request #48 from slamice/master

Added use_preferred option to jobs POST
Merge pull request #49 from slamice/master

clarified what the ts field means
Merge pull request #50 from slamice/master

added commas to the documentation for copy/pasters
added function preferred translators
Merge pull request #51 from alexlide/add-preferred-translations-function

added function preferred translators
Added Google Tag Manager to developer docs
Merge pull request #52 from seiyavogt/tag-manager-docs

Added Google Tag Manager to developer docs
fixed docs for posting 100% matching jobs