Support for better flashsms.

[mattiassvedhem]

I bumped Webmock, split up the specs so they're easier to read and added better support for flashsms. I think it's better to coerce the flash value, which preferably is a boolean, in the library itself instead of the user needing to do it.

Of course, :flashsms => 'yes', still works.

Maybe if the coercion and checking of parameters continue to grow, it should be extracted out of the send method. What do you think?

[mattiassvedhem]

Some ruby versions throws the arguments around, need to figure out a better way to mock that request. And also garbage json example fails under ruby-head. In general though, do you want me to keep the cleanup of the specs?

[jage]

Yeah, the specs really need a cleanup.