pull in upstream changes but keep base sdk at iphoneos4.0
release _urlRequest in dealloc because it is retained in initWithRequest:
fixed readme
updated project for XCode 4
Merge pull request #10 from adamvduke/XCode4

updated project for XCode 4
Added support to generate an HTTP POST Body from a dictionary for URL Encoded Form Data
Fixed minor warning
Merge pull request #13 from Vortec4800/master

Added support to generate an HTTP POST Body from a dictionary for URL Encoded Form Data
Added speed info to the progress handler

Added speed and seconds remaining to the progress handler block
Merge pull request #16 from Vortec4800/download_speed

Added speed info to the progress handler
Looking for new maintainer!
update the README to reflect a new maintainer
merge probablycorey/master to a-new-direction