Roll deps.

TBR=neil.fraser@gmail.com
BUG=

Review URL: https://codereview.appspot.com/7311050

git-svn-id: http://blockly.googlecode.com/svn/trunk@620 c400ca83-b69d-9dd7-9705-49c6b8615e23
Created externs to allow checkTypes to be enabled.

TBR=neil.fraser@gmail.com
BUG=109

Review URL: https://codereview.appspot.com/7307045

git-svn-id: http://blockly.googlecode.com/svn/trunk@621 c400ca83-b69d-9dd7-9705-49c6b8615e23
Made compile depend on generated externs so make clean all works.

Also created constents for gen.pl.

TBR=neil.fraser@gmail.com
BUG=None

Review URL: https://codereview.appspot.com/7309055

git-svn-id: http://blockly.googlecode.com/svn/trunk@622 c400ca83-b69d-9dd7-9705-49c6b8615e23
Added duplicate and missingProperties errors.

TBR=neil.fraser@gmail.com
BUG=None

Review URL: https://codereview.appspot.com/7306050

git-svn-id: http://blockly.googlecode.com/svn/trunk@623 c400ca83-b69d-9dd7-9705-49c6b8615e23