[FIX] can't show author when there are no commits
[FIX] square parens makes CPAN::Changes think author is group. Closes #11
v0.0.10

 [Bugfixes]
 - square parens makes CPAN::Changes think author is group. Change to().
   Closes #11. Thanks @tobyink for reporting (Ioan Rogers)
 - don't try to show author when there are no commits (Ioan Rogers)