@gkatsev fixed isFullscreen reporting on iOS devices. closes #1511

Squashed commit of the following:

commit 02fe7a40d0958e2ed84a6a0cf2be43bec259c72c
Author: Gary Katsevman <git@gkatsev.com>
Date:   Tue Sep 23 14:15:08 2014 -0400

    Feature detect old fullscreen instead of UA switch

commit f3eccbbe678c163021d790c69c3ab365e0a1fe1a
Author: Gary Katsevman <git@gkatsev.com>
Date:   Mon Sep 22 21:31:34 2014 -0400

    No need for if since assume we're in fs

commit 0498b100843e0aa858b166d02a467e4471c126ab
Author: Gary Katsevman <git@gkatsev.com>
Date:   Mon Sep 22 21:28:10 2014 -0400

    Revert "Don't trigget vjs's fullscreenchange event"

    This reverts commit cc45177ee5fa950e665e066d170b137aaeb6e398.

    Conflicts:
    	src/js/media/html5.js

commit 1ed30853efb2ea043da4f18b4fdf75da15f55e88
Author: Gary Katsevman <git@gkatsev.com>
Date:   Wed Sep 17 12:00:29 2014 -0400

    Listen via 'this.one'.
    Don't bother checking whether the video element is fullscreen but just
    assume we are fullscreen.

commit 27e27075083d2ad408b5d47055881b2554f59154
Author: Gary Katsevman <git@gkatsev.com>
Date:   Tue Sep 16 18:12:36 2014 -0400

    Use one for event binding.

commit cc45177ee5fa950e665e066d170b137aaeb6e398
Author: Gary Katsevman <git@gkatsev.com>
Date:   Mon Sep 15 17:28:46 2014 -0400

    Don't trigget vjs's fullscreenchange event
    This event isn't really being used for this usecase right now, so, no
    need to trigger it.

commit ad505a680785d638289657aec4edad60879e945a
Author: Gary Katsevman <git@gkatsev.com>
Date:   Mon Sep 15 16:45:48 2014 -0400

    Update exports for request & cancel fullscreen

commit e423635b6c8ad58a1ba04e1534a51c075e08b73a
Author: Gary Katsevman <git@gkatsev.com>
Date:   Mon Sep 15 16:15:10 2014 -0400

    On iOS, use ios specific enterFullscreen methods.

commit fe4a8fbf6ad73b6bc8f57d16c44f0ca4d3bf9450
Author: Gary Katsevman <git@gkatsev.com>
Date:   Mon Sep 15 14:53:20 2014 -0400

    Export isFullScreen correctly. Export isFullscreen as well.