Reduce the size of newblocks by 50%

THIS COMMIT IS PART OF OUR BRANDING for bnb100

Remove the closure library from being included in build/war. It isn't
needed.  The one file (so far) that is (a css file) is explicitly
copied over. By doing so we reduce the file count (greatly) in a
deployment and reduce the size of deployed appinventor by about half.

We also compile both GWT and Blockly to reduce the size of what has to
be loaded into a client's browser.

Change-Id: Ie276335bf7fe2587b8a40a4ac18fab3664a73420
MIT BRANDING COMMIT

MIT BRANDING COMMIT: This commit sets up the MIT App Inventor 2 Alpha
Release (formerly "newblocks") branding.

Change-Id: I4eb3a1e4b6cfcbf1a5530529a1465dc529afe235