Normalize the 2014.7.0 release notes

Some parts of the release notes only existed in develop, some only in
2014.7. This commit normalizes 2014.7's copy.
Documented JSON outputter config options and fixed 'null' case
Merge pull request #15300 from whiteinge/salt-json-line-out

Documented JSON outputter config options and fixed 'null' case
fix bullet list
Update 'doc/.tx/config' - Build #152

  http://cookingwithsalt.org/job/salt/job/transifex/152/

Signed-off-by: Pedro Algarvio <pedro@algarvio.me>
Merge pull request #15302 from s0undt3ch/hotfix/transifex-updates

Hotfix/transifex updates
Merge pull request #15299 from terminalmage/update-release-notes-2014.7

Normalize the 2014.7.0 release notes
Merge remote-tracking branch 'upstream/2014.7' into develop