Add "tweet this" link to plugin creation confirmation page

[JTFouquier]

After a user creates a plugin, they see a modal window to "Go to plugin". In addition, there should be a "tweet this" button that allows them to tweet from their own twitter account.

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• Bitbucket: https://bitbucket.org/sulab/biogps_core/issue/31
• Originally reported by: Andrew Su
• Originally created at: 2013-06-06T02:34:44.962