iOS / asi-http-request

Tweak comment

Closes gh-46

Closes gh-47

Also fix download content length test

…taining a port with ones that don't -  Closes gh-39
Many thanks to Luke Redpath for tracking this down!

Add same to Cloud Files

Add test for same

…/ incrementDownloadSizeBy

Run synchronous requests in custom runloop mode again

Add test for same

Cast zlib stuff to unsigned int to fix problems with uInt / UInt being a different size on different architectures
Have ASINetworkQueue reset progress in when setting progress delegates
Stop calling [super initialize] in ASIHTTPRequest
iPhone sample app now uses the same images as Mac sample in the queue example

Use slightly stricter build config, fix 64bit issues

Add request:didReceiveData: delegate method

Make currentXMLELementContent / currentXMLElementStack setters public to allow use from subclasses without synthesizing again

Have all ASIS3Request subclasses parse the xml response in request finished - cuts out quite a bit of duplication
Service and bucket requests now correctly parse error message xml
Fixes to query string generation for bucket requests
Keep track of the current element stack so we can correctly parse common prefixes
Fix a couple of leaked objects
Add new tests for issues raised by Tom Andersen in his patch + email

…Ruby (+hopefully slightly more performant)