fix old style gist url not found issue
Merge remote-tracking branch 'aleiphoenix/fix-gist-plugin' into source

Fixes the issue of unable to build if you have only provided the Gist ID
without a username.

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
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# the commit.
d an empty message aborts
# the commit.
Updated source Thu Sep 19 01:15:57 CEST 2013