Replace Delphi with Perl, rearrange a bit

This replaces #21; I accidentally my fork.

The Delphi binding has been removed in favor of Perl's Git::Raw, and the positions have been shuffled a bit to make related things closer (master on left, this change on right).

![libgit2](https://f.cloud.github.com/assets/39902/1423789/5bd98bae-4011-11e3-9865-2a897e24dc8b.png)