Fixing isExpired check and updating oauth_nonce generation.
Fixing isExpired check and updating oauth_nonce generation.

bdbergeron/BDBOAuth1Manager,silverorange/BDBOAuth1Manager,bogdans-telenav/BDBOAuth1Manager,vdemay/BDBOAuth1Manager,CrowdTunes/BDBOAuth1Manager,schmidan/BDBOAuth1Manager,stratistore/BDBOAuth1Manager,hoangdang1449/BDBOAuth1Manager