Merge pull request #1 from dmage/master

'json' dependency
CONTRIBUTORS
small fixes
Merge remote-tracking branch 'origin/master'
highlight.js repacked for javascript
ruby -> javascript fixes
line numbers
Merge pull request #2 from orofarne/SpiderMonkey

Spider monkey
added screens

Signed-off-by: Oleg Bulatov <oleg@bulatov.me>