Adding Phone To helper like mail_to for handling phone numbers

Adding Phone To helper like mail_to for handling phone numbers

Useful for mobile browsers and desktop browser with phone supported software.

Creates a tel link tag to the specified +phone_number+

Accepts blocks

Unable to call link_to 
Most of the functionality within link_to to do with url generation using controller or objects can be skipped. 

So this is in essence a mail_to like helper.

I have updated the rest of the code and shall await response.