Change gittip to Gratipay

https://medium.com/gratipay-blog/gratitude-gratipay-ef24ad5e41f9
More Perl::Critic fixes
More Perl::Critic fixes
More Perl::Critic fixes
perltidy was complaining about .gitignore. This change satisfies perltidy. Should we skip .gitignore when checking with perlticy?
Merge pull request #1325 from book/master

Change gittip to Gratipay
Merge pull request #1327 from szabgab/szabgab/gitignore

perltidy was complaining about .gitignore.
Merge pull request #1326 from szabgab/szabgab/perl-critic

More Perl::Critic fixes