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
Merge pull request #38 from Picturelife/master

Don't Escape Tildes as per Instructions in RFC 3986 and OAuth 1.0 Spec
Add NSCoding support to AFOAuth1Token.
Replacing string constants with property-equivalent literals

Minor formatting
Adding NSCoding conformance to AFOAuth1Client
Making AFOAuth1Token conform to NSCopying
Adding missing verifier property to AFOAuth1Token NSCoding & NSCopying
Making AFOAuth1Client conform to NSCopying
Add error handling when return query string doesn't contain OAuth parameters

Signed-off-by: Mattt Thompson <m@mattt.me>
[Issue #36] Fixing sort order of HMAC signature

Signed-off-by: Mattt Thompson <m@mattt.me>
Merge pull request #33 from jnormore/master

Updates request factory to exclude oauth_* params due to Authorization header
Minor formatting
Merge pull request #28 from owen-bnr/scope

Added an optional scope parameter for getting a request token.