Remove unused code from global.js
Remove empty search.js
Remove unused code from include/xbmc.js
Remove unused app.js file.
Remove unused poster/fanart code.
Remove unused default.html
No need to redefine Ext.BLANK_IMAGE_URL
Remove unused checkWatchedInt
Remove unused unsign() function.
Remove unused code from include/xbmc.js
Comment out a large chunk of broken code.

This code uses the old HTTP API which no longer works. For now comment
out the code and print an error message to the console if it gets used.
Update the change log for Issue #68.
Merge pull request #68 from fyfe/spring-clean

[WIP] Spring clean
Refactor the quick search code.

Remove the duplicate code and wrap it in a function so it can be
customised for the page it's being used on.
When inserting html tags don't do half a job.
Replace removeSpace() with Strings builtin trim().
Cleanup the TV show ui.
Cleanup the TV show backend.
Clean up and refactor tvshows/app.js
Clean up the rest of the TV show backend.