Deploying 12 workers
Changing calculator syntax.

Signed off by Diego Araújo <diegoamc90@gmail.com>
Removing unused function add_variable

Signed off by Diego Araújo <diegoamc90@gmail.com>
Implemented timeout for JavaScriptEvaluator

Signed off by Diego Araújo<diegoamc90@gmail.com>
Checking avilability for git modified so it should work on Travis

Signed off by Renan Fichberg <rfichberg@gmail.com>