Send SMS with Issue Information

Description
==============================================
Now, you can send a SMS to your costumer or reporter using a simple link in 
your issue page.

After you send a SMS this attached in bug_note how new note

Only Tested in v1.2.20


Versions
===============================================
v0.1 First Release


SMS Providers
===============================================
We tested with this providers

* www.clickatell.com - You Need create a Account


FAQ
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¿What Information Send?
* Handler Name
* Issue ID
* Project name
* Other information in string_*

¿What Limit have SMS Text?
It's limited to 160 characters. 


