Added code/readonly.html to show arbitrary blocks in documentation.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/13246051

git-svn-id: http://blockly.googlecode.com/svn/trunk@1363 c400ca83-b69d-9dd7-9705-49c6b8615e23
Finished writing message documentation for all messages.
Next step: Convert other languages' _messages.js files to .json.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/13750044

git-svn-id: http://blockly.googlecode.com/svn/trunk@1364 c400ca83-b69d-9dd7-9705-49c6b8615e23
Change MSG_ to Msg. to resolve Closure compiler errors.  Separate blocks from languages.

R=spertus@google.com

Review URL: https://codereview.appspot.com/13242061

git-svn-id: http://blockly.googlecode.com/svn/trunk@1365 c400ca83-b69d-9dd7-9705-49c6b8615e23