Create new field type "code" #190 using code mirror.

Example:
field: { type: Types.Code, lang: 'c|c++|objetivec|css|asp|c#|vb|xml|php|html|ini|js|java|coffee|lisp|perl|python|sql|json|less|sass|sh|ruby|jsp|tpl|jade' }
Merge pull request #210 from altairstudios/master

Create new field type "code" #190 using code mirror.