twitter 6.x-3.0-beta7

Many bug fixes:

• Added documentation to README.txt regarding posting to Twitter and sign in with a Twitter account.
• #1211916: Bugs with " sign in twitter" module.
• Fixed warnings due to evaluations on undefined array indexes.
• Removed password from set_auth and get_auth methods in Twitter class, as it is not used.
• Updated README.txt with a step guide for creating a tweets block.
• #798458: utc_offset can come back as NULL
• #1279158: No error messages if an API call hits the rate limit
• Reverted #1255510: Upgrade to oauth 3.x (oauth_common) and moved it to 6.x-4.x as it involves api changes and upgrading to Oauth 6.x-3.x.
• Added functional tests to verify non Oauth actions.
• #658784: Add CCK Field weight settings and vertical tabs compatibility
• #1255500: Update views fields
• #429950: Ability to set default behavior per content type