Fixed cross domain issue when setting content type

- Also fixed jsonp fail issues

#947, #1745
Generated JavaScript minified/compiled files for

#947, #1745
Added defaultContentType property to the signalR object.

- This also included making a private object off of signalR

#947, #1745
Compiled/minified code review changes
Added ajaxSetup test to verify its correctness

#947
Updated signalr minified files
Addressed code review comments

- Removed signalRPrivate variable from the common file
- Also minified/compiled changes

#1745