CB-6055 Fix mobile-spec trying to JSONify a FileEntry.

Used to be okay, but not anymore.
Add a "bulkEcho" mode to exec() benchmark. Impl for Android only.
Add a create script that uses plugman instead of CLI.
CB-6117: Add manual spec test for displaying downloaded images
CB-6106: Test fileEntry.toNativeURL method
CB-6116: Test handling of resolveLocalFileSystemURL on file://localhost/<path> URLs
CB-6051: Test HTML5 video with native URLs
CB-4952: Test handling of file:///private/ URLs
CB-6148: Test cross-filesystem copy and move
added localXHR test to prove CB-6299 fix is effective
fixed test id
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-mobile-spec
CB-6163 Document geolocation fields