Consider leading v for special cases.

Special cases like the following names have been already handled in this module:
- Unicode-Collate-Standard-V3_1_1-0.1
- Task-Deprecations5_14-1.00.tar.gz

I think version with leading-v  is also valid module version as described in .http://search.cpan.org/perldoc?version
So, leading-v should be considered in these special cases, shouldn't it?

Actually, it fails to parse my module Software-License-Boost_1_0-v0.0.1.tar.gz

I adjusted regexp for special cases and added 2 test cases for version with leading-v, also.

Thank you.