Fix enabling of inspector Page domain. Cleanup live dev startup sequence. Add fallback promise to inspector method calls without explicit callback.
fix jshint error
reconcile with iwehrman's cleanup in #3202
check for null after _createDocument
fix for #3410 to reconnect agents before reloading the live document in browser
Add installation functionality to Extension Manager:
* "Install" buttons now appear in each registry item.
* Already-installed extensions have a disabled install button (that shows "Installed").
* Extensions with incompatible Brackets version requirements have a disabled install button and a warning message.
* File > Install Extension... has been moved out of the main menu, and is now an "Install from URL..." button on the Extension Manager dialog.
Code review fixes:
* Made tests more robust by listening for status changes instead of just waiting for file access to complete
* Scrubbed real names out of mock data
* Comment fixes
Merge pull request #3470 from adobe/nj/extension-list-install

Add installation functionality to Extension Manager
Merge pull request #3442 from adobe/jasonsanjose/issue-3402

Fix live development connection in Chrome 27 beta