Revert "Update to cef 3.1547.1337"

This reverts commit f871e6f749f86116d39538406522122ffb6cce4d.
Merge pull request #289 from adobe/jasonsanjose/revert-cef

Revert "Update to cef 3.1547.1337" for Sprint 28 build
Set sprint 29 version
Merge pull request #290 from adobe/nj/set-sprint-29

Set sprint 29 version
update list of Open With... file types to match those listed in src/languages/languages.json
Merge pull request #293 from adobe/bchin/open-file-in-Brackets-from-Finder-OSX

Open File in Brackets from Finder (OSX)
update grunt for new cef version
Merge pull request #295 from adobe/jeff/integrate-cef-3.1547.1354

Update Shell to CEF 3.1547.1354
grunt set-sprint --sprint=30
Merge pull request #298 from adobe/jasonsanjose/sprint30

grunt set-sprint --sprint=30