iOS / asi-http-request

* Ask cache for responseData rather than reading directly from the cached file path when not downloading to disk

Fix blocks test

Small fixes to iPad sample

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

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

Fix exception in ASIWebPageRequest when not using a downloadDestinationPath and body is nil

…here available. This makes viewing cached local content in a web view work better
* Use xmlsave api to prevent libxml adding xml declaration to the generated html
* Add html5 audio tag, and video poster attribute to xpath query
* Prevent download of webm, ogg and ogv files
* Make accurate progress tracking work in iPhone sample

Fix progress views not showing up in iphone sample, and fix potential divide by zero
More comments to explain ASIWebPageRequest

Conflicts:
	Classes/ASICacheDelegate.h
	Classes/ASIDownloadCache.m
	Mac.xcodeproj/project.pbxproj
	iPhone.xcodeproj/project.pbxproj

Tweak reading content-length to allow responses larger than 2GB

* ASIDownloadCache now strips trailing slashes from urls when building the key used to store the data. Now it doesn't matter if the request's url includes the trailing slash or not
* ASIDownloadCache now names all data-files with an .html extension. This allows ASIWebPageRequest to display frames and iframes with local content.
* Remove broken NSURLCache compatibility from ASIDownloadCache
* ASIDownloadCache now stores its data in the NSCachesDirectory instead of  NSTemporaryDirectory (Thanks to Dincho Todorov for pointing this out!)

Tweaks to Mac sample app layout

Fix some spelling mistakes. One of these days it will be necessary to sit down and learn how to spell 'necessary'.

Show cached responses in list

Improve iPad ASIWebPageRequest sample to show the resources being downloaded

Fixed a problem where streamError seemed to be non-nil even when no error occurred - change to look at streamStatus instead

Added replaceURLsWithDataURLs option to ASIWebPageRequest to allow leaving HTML and CSS unchanged (useful with the above change)

Added primitive download progress tracking
Tweak Mac sample to load clicked links with ASIWebPageRequest

Still need to add dtd for xhtml, or it will choke on html entities