don't set ``client_secret`` request parameter if self.secret is nil
Use KVC to allow for nil secret value
Require clientID parameter in constructor
Removing FUD
bug fix : changing expires_in to doubleValue
Removed explanatory comment
Prevent crash when expires_in or refresh_token is null
Remove warnings when building on OS X
Adding Xcode workspace
Changing name of local variable authOperation -> requestOperation
Fixes memory leak when retrieving credentials

Fixes #21
Bumping version to 0.1.1
Moved the `clearAuthorizationHeader` call

This allows authorization to be set, and used, outside the call to
`authenticateUsingOAuthWithPath...`
Update README.md

Fixes #36
Adding documentation

Minor reformatting
Rename kAFOAuthCredentialServiceName to kAFOAuth2CredentialServiceName

Fixes a duplicate symbol error when linking to AFOAuth1Client.
added link for 0.1.1 docs in readme.
import frameworks in pch file
storeCredential:withIdentifier extended to allow selection of security accessibility while providing a decent default.
Merge pull request #56 from Miners/master

Allows specification of kSecAttrAccessible attribute