iOS / asi-http-request

…ue fails - Many thanks to andr8w for taking the time to track this down!
Notify request delegates before queue of changes in request status
Add handy reset method to ASINetworkQueue
Download smaller files in a couple of tests so they run quicker

S3: Handle connection closed message from Amazon
S3: Fix mime-type for data uploads
S3: Improve list test
S3: S3 requests default to a lower persistent connection timeout
Added test for clearing upload progress
Move requestID to a property of the request - this is a bit cleaner, and prevents retries getting a new id

…er than forcing the user to encode the key themselves or add a '/' on the front
My thanks to Tom Andersen for his report!

Retry the request if we encounter a 'Socket is not connected' error - but can't figure out how to write a server to test this after much experimentation
Add more tests for persistent connections

…at didn't change their request method until the very last minute

…mean queueFinished will be called when a request fails
See also lighthouse ticket: http://allseeing-i.lighthouseapp.com/projects/27881/tickets/43

… when they are explicitly turned off, or when we've got http1.0 and no connection:keep-alive header
canUsePersistentConnection -> connectionCanBeReused, and add public accessor
Add test for connection: close

…tConnection or we get a connection:close header
Stop relying on receiving a keep-alive header for persistent connections

…ays read cookies from the shared HTTP cookie store

Tweak locking behaviour for session credentials

Fix a potential lock issue with redirected requests

… rather than the last Closes #18
Copied requests now remember redirect behaviour
Fix typos in comments

Conflicts:
	Classes/ASIHTTPRequest.m

…o a new function for easier subclassing

Authenticate method now returns an NSError if something goes wrong
Change lock mediating access to credentials to recursive