Update bin/pip-dump

Update to pip-dump.find_default_files() to match more default filenames patterns
Update bin/pip-dump

Forgot imports :)
Update bin/pip-dump

I'm sorry for spamming commits, I really need some time to sleep…
Update tests/dump-to-multiple-req-files.t

I think I did it right way…
I think that now it's ok. TODO: learn how to write tests…
Removed extra blank line that caused test to fail
Merge pull request #24 from mktums/patch-1

Update bin/pip-dump