Update AFOAuth1Client/AFOAuth1Client.m

Allows to use oAuth without token (using only consumer key)
Adding comma (,) as a percent escaped character since it's in the reserved words per the RFC
Add two-legged auth support

Adds two legged auth support by being smarter about picking up auth parameters from the request or building them on the fly.

Fixes the broken behavior of adding all parameters to the Authorization header
Added multipartFormRequest and refactored auth header
Merge pull request #22 from lxcid/master

Fixes for Flickr OAuth implementation.
Merge pull request #18 from shir/patch-1

Allows to use oAuth without token (using only with consumer key)
Merge branch 'bug/two-legged' of git://github.com/madninja/AFOAuth1Client into madninja-bug/two-legged

Conflicts:
	AFOAuth1Client/AFOAuth1Client.m
Merge pull request #25 from madninja/bug/percent-escapes

Adding comma (,) as a percent escaped character
Merge branch 'master' of https://github.com/AFNetworking/AFOAuth1Client

Conflicts:
	AFOAuth1Client/AFOAuth1Client.m
Merge branch 'authheader' of git://github.com/pj4533/AFOAuth1Client into pj4533-authheader

Conflicts:
	AFOAuth1Client/AFOAuth1Client.m
[Issue #17] Setting accessToken to requestToken in -acquireOAuthAccessTokenWithPath:requestToken:accessMethod:success:failure:
Updating version to 0.1.1
Added an optional scope parameter for getting a request token per https://developers.google.com/accounts/docs/OAuth_ref#RequestToken. Should not affect existing code.
Unregister as observer on  application launch notification in notification block
Unregister from notifications on dealloc. Handle case where there is a dangling notification observer still registered when a user cancells the sign-in
moved unregister notification to end of block
Updates requestWithMethod:path:params to not use post or query params. Updates authorization request to use query params.
Renamed unregisterFromApplicationLaunchNotifications to removeApplicationLaunchNotificationObserver
Exclude oauth_ prefix parameters from request in request helper
don't escape tildes as per http://oauth.net/core/1.0/ and http://tools.ietf.org/html/rfc3986#section-2.3