always use XMLHttpRequest

current behavior will use XDomainRequest whenever it is available even though the request is not necessarily CORS. this creates a problem when on certain browsers (e.g. ie10) because:
- Access-Control-Allow-Origin header is expected despite the request not being CORS
- XDR does not have an onreadystatechange function (http://msdn.microsoft.com/en-us/library/ie/cc288060(v=vs.85).aspx) and use of its proper callback functions appear to have not yet been implemented
Correcting web services unwrapping code doc
Merge remote-tracking branch 'upstream/master'
Fixing typo in code example
Undoing a wrong patch
Merge pull request #131 from eddyystop/master

Likely small typo in module docs
Merge pull request #121 from syk0saje/patch-1

always use XMLHttpRequest
Merge remote-tracking branch 'origin/master' into next
document XDomainRequest breaking change