iOS / asi-http-request

…method to POST if nescessary
Closes gh-57

Dismiss auth dialog

Import UIKit in ASIAuthenticationDialog
Add new reachability class
Tweak license to mention new reachability class
Tweaks

* Tweak cancel stress test to make it more likely to catch above issue
* Use an empty CFRunLoopSource instead of a timer to keep request thread runloop from exiting
* Only run the version numbering script if git is available at the path the script expects
* Tweaks

Stop dismissing dialog from request - doesn't make sense because the request doesn't own it

Add new isNetworkInUse class method that works on Mac too

Merge branch 'new-queue-threading-model' into v1.7

Conflicts:
	Classes/ASIHTTPRequest.h
	Classes/ASIHTTPRequest.m

Conflicts:
	Classes/ASIHTTPRequest.m
	Classes/Tests/ASIHTTPRequestTests.m
	Mac.xcodeproj/project.pbxproj
	iPhone.xcodeproj/project.pbxproj

Conflicts:
	Classes/ASIHTTPRequest.m
	Classes/ASIHTTPRequestConfig.h
	iPhone.xcodeproj/project.pbxproj

Conflicts:
	Classes/ASIHTTPRequest.m

…ls, and is smart enough to recognise ones asking for the same set of credentials
Simplfy auth dialog api - we now look at the authenticationNeeded property of a request to determine if this is a proxy dialog or not

Make rotation work on iPhone OS
Hide prompt title in landscape on iPhone

Conflicts:
	Classes/ASIHTTPRequest.m

* Reintroduce one status timer per request, so it can run with a different threading model (eg per-request thread)
* Stop using a lock to block the request thread, and simply have a timer that runs forever doing nothing instead

Most tests passing now... :)

Tweak comment

Conflicts:
	Classes/ASIHTTPRequest.m
	iPhone.xcodeproj/project.pbxproj

Closes gh-46

Closes gh-47

Also fix download content length test