1. fixed the image relativity handling to only check for '/path' and not '//path' which is handled by fixProtocol
2. added meta handlers for description in the getPreview method
3. addded a new property called favicon
Merge branch 'master' of https://github.com/anubhavsahoo/beaglejs into anubhavsahoo-master
Merge branch 'anubhavsahoo-master'
fixed image urls. added favicon test.