Fix regression introduced by PR #510. Fixes #555.
Move all manifest validation logic to /addon/lib/validator.js and unit
test it.
Removed b2g-content.css
Merge pull request #549 from ochameau/validator

Move all manifest validation logic to /addon/lib/validator.js and unit test it.
Merge branch 'fix-510' of git://github.com/ochameau/r2d2b2g into ochameau-fix-510
correct paths to which Gaia XPIs must be written
Merge pull request #559 from bkase/fix-redundant-sheet

Removed redundant b2g-content.css
update version for 4.0pre3 build
update version for 4.0pre4dev development
Fixed a typo (aDir => appDir)
Merge pull request #563 from bkase/typo-fix

Fixed a typo in webapps actor