Merge pull request #18 from kurli/MemoryGame_manifest_fix

Change MemoryGame/manifest.json:local_path to app/index.html
Merge pull request #9 from kurli/master

    Build script to build web apps
For some web apps, we just submodule from external repo,
and our changes sometimes hard to be merged on time, so patch is needed.

Apply patch scenario:
  1. Check whether it's a git submodule, otherwise, skip below scenario
  2. Get sorted patch file list (Patches need to be orderly patched)
  3. Check whether patch files under WebApp folder, if none, skip below scenario
  4. Checkout the submodule to 'master' branch
  5. Remove 'auto_patch' branch which was created during previous build
  6. Create a new 'auto_patch' branch
  7. Apply all the patches
  8. Checkout to 'master' branch
'auto_patch' branch will be remained after build for further review.

BUG=#16