iOS / asi-http-request

Retain timer so we can explictly manage when we no longer need it, it will retain request

…pid and complicated one in ruby

…(or gcd thread pool on sn)
This is probably for the best in the long wrong - the extra flexibility brings x-platform behaviour differences / bugs, and would almost certainly mean support headaches down the line
* Combine authenticationChallengeInProgress / proxyAuthenticationNeeded into authenticationNeeded
* Make readStream an NSInputStream = more typecasting, but less CFRetain/CFRelease risks, and probably better for subclassers
* Tweak tests and remove support for auto-redirect for 305/307 to prevent crash
* Use more accessors

Redirect / authentication required requests download the full response before trying again, so they can re-use the connection
Invalidate the connection when a request fails to prevent subsequent requests getting stuck on a bad line

More performance tests

…t, ASIBucketObject all now implement the NSCopying protocol
Tweak to notify NSOperation that the request is finished when failWithError called (important for requests that fail during construction)

Conflicts:
	Classes/ASIHTTPRequest.m
	Classes/Tests/ASIHTTPRequestTests.m

Closes gh-14.

Also fixed unit tests for S3 on Mac, continued fallout from that setDoubleValue: debacle

…e browser convention (rather than the rfc)

Conflicts:
	Classes/ASIHTTPRequest.m

…uest created by ASINetworkQueue fails
Thanks to Hermes Pique for his bug report!

Add back in Snow Leopard detection for deciding whether to spawn a new thread
Made delegate authentication work again in a background thread
Tweak tests

Expand explanation on delegate selectors
Thanks to Christoph Ludwig for noting these issues!

Conflicts:
	Classes/ASIHTTPRequest.m

Change ASIInputStream to remove hacky workaround, it's now just a proxy that records the data sent

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

This highlights the performance disparity between NSURLConnection and ASIHTTPRequest, which we need to solve :)

Fix throttling
Tweak iPhone sample to show throttle status

Reachability class version set by user with a config switch, rather than using the extra class to do detection at runtime.
Move this config option and ASIHTTPRequest_DEBUG into a new config file
Tweak iPhone sample to show bandwidth / wwan status, just for my benefit in testing
Include both versions of reachability