New pecl extension git2

Hi all, this is Shuhei. I'd like to propose new pecl extension which name Git2. This extension uses libgit2 library. Currently, git2 extension provides basic repository manipulation: commit log walking, create new commit, obtaining blob... still some feature (remote and custom backend) are in experimental. but others are okay. for example: commit log walking ```` $repo = new Git2\Repository($path); $walker = new Git2\Walker($repo); /* specify HEAD oid */ $walker->push("6e20138dc38f9f626107f1cd3ef0f9838c43defe"); foreach ($walker as $oid => $commit) { printf("oid: %s\n", $oid); printf("message: %s\n", $commit->getMessage()); } ```` ============================ License: MIT License Repository: https://github.com/libgit2/php-git (for now, php-git2 uses MIT license. If this is accepted, i'll re-licensing to PHP license) libgit2: https://github.com/libgit2/libgit2 libgit2 licence: GPLv2 linking exception ============================ libgit2 uses GPLv2 linking exception license. so it compatible with Apache 2.0 license for linking the module. https://github.com/libgit2/libgit2/issues/567#issuecomment-4038696 probably it has not license issue for listing to PECL. what do you think about this extension? Thank you for any feedback. Sincerely, Shuhei