App::gh 0.55

- Added a --long option to the search command of App::gh, and improved the search result printing.

- @mattn++ added a pullreq command, so you can send pull requests from command-line

- mattn also added an issue command, you can manage issues from command-line mostly.

- I've improved the issue printing and pull request printing.
- Thanks to  alexchorny, chocolate.  garu, gfx, tokuhirom, tyru, xaicron, zakame (ordered by alphabet)
- The "All" command is also improved, when running "gh all" on existing repositories, gh will execute `remote update --prune` command to update the repository.

Also thanks to those who contributed patches and improvements, the list below is grepped from the commit log of App::gh:

   8 Author: Alexandr Ciornii <alexchorny@gmail.com>
   5 Author: Breno G. de Oliveira <garu@cpan.org>
   1 Author: Chris Weyl <cweyl@alumni.drew.edu>
   9 Author: Cornelius <cornelius.howl@gmail.com>
   8 Author: Fuji, Goro <gfuji@cpan.org>
  36 Author: Ryan C. Thompson <rct@thompsonclan.org>
   4 Author: Tokuhiro Matsuno <tokuhirom@gmail.com>
   1 Author: Zak B. Elep <zakame@zakame.net>
 346 Author: c9s <cornelius.howl@gmail.com>
   4 Author: chocolateboy <chocolate@cpan.org>
   9 Author: mattn <mattn.jp@gmail.com>
   5 Author: tokuhirom <tokuhirom@gmail.com>
  30 Author: tyru <tyru.exe@gmail.com>
   1 Author: xaicron <xaicron@gmail.com>
   3 Author: yj <liyuray@gmail.com>

App::gh is on GitHub!
https://github.com/c9s/App-gh