[manifest] Updates for Crosswalk 9
Merge pull request #155 from crosswalk-project/manifest-update-crosswalk9

[manifest] Updates for Crosswalk 9
[samples] Update links/notes for new release of sample code

Releasing a new version of samples (0.9) which updates manifest
for Crosswalk 9, cleans up the space-dodge-game README, and fixes
the WebGL sample.
[embedding API] Add version 3 API docs