Revert "Merge pull request #11 from masaki/support-git-url"

This reverts commit 3f3a58f9f90472f5e62f74b2d216f6a3092ac7e4, reversing
changes made to 56863c610dd38a263ff7008b4fda503c605591af.

Conflicts:
	t/requirement.t
0.9031