Add a wait for install button to be visible
Merge pull request #651 from rushcreekdev/master

made Xfail for bug 920700
Merge pull request #650 from bobsilverberg/dev_section

Add a wait for install button to be visible
Xfailed platform specific test
issue 581 - Intermittent failure on amo.dev.mac.saucelabs - element not displayed
Merge pull request #653 from AlinT/xfails_issue_581

Xfailed platform specific test
Issue 654
Merge pull request #655 from AndreiH/prod_failure

Issue 654
Updates