Add racket-mode

https://github.com/greghendershott/racket-mode
Add recipe `elscreen-mew`
Fix racket-mode recipe to include sandbox.rkt
Merge pull request #1207 from masutaka/add-elscreen-mew

Add recipe `elscreen-mew`
Add flymake-racket
Change evm recipe repo.

There are now two repositories: evm and evm.el. Use evm.el, which is the
one that contains the Emacs Lisp code.
Merge pull request #1208 from rejeep/evm-url

Change evm recipe repo.
Allow Makefile to work if the "timeout" binary is not available
Merge pull request #1210 from milkypostman/timeout-makefile-fix

Allow Makefile to work if the "timeout" binary is not available
minor fix for timeout makefile command
add midje-test-mode
Merge pull request #1211 from bpoweski/master

Add midje-test-mode
Re-apply "Neater display of build results" commit (lost in fasterbuild merge?)
When updating git repos, also grab and update submodules

See #1213, re. yasnippet
Merge pull request #1206 from yasuyk/racket-mode

Add racket-mode
Add recipe for html-to-markdown
Merge pull request #1214 from Bruce-Connor/master

Add recipe for html-to-markdown
Add recipe `historyf`
Merge pull request #1215 from masutaka/add-historyf

Add recipe `historyf`