Add ability to preview Mobile Theme
Fixed modifying the page output through the on_page_output event.
Deleting unused file
Merge pull request #1713 from ExchangeCore/meta-data

Deleting unused metadata file
Moved "on_page_output" to PageView and changed the event name fired at BlockController to 'on_block_load'.
Merge pull request #1684 from hissy/mobile-preview

Add ability to preview Mobile Theme
Merge pull request #1689 from mainio/fix-on-page-output-event

Fixed modifying the page output through the on_page_output event.