#121 and #51 - Add support for Command Line Params

[joaoffalcao]

There are two open issues, #51 and #121, all about the same issue. This is the solution for that problem.

With this, we can do grunt protractor --params.location=http://localhost:3030/

[joaoffalcao]

Do you know what's going on the continuous integration check?

[teerapap]

Thanks for the PR. 👍
However, #148 also fixes the same problem but there still be some issues. Could we discuss in that PR?

BTW, Current behaviour is you need to pass escaped JSON object string for --params. (Sorry for unclear README.md)
Please try this

--params='{ "location":"some url" }'