[ASAP] Copying

Could you write clearly the license of git-now? @sinsoku & I specified the license and @sinsoku wrote it on his blog. Original git-now codes are licensed by GPLv2 (same as git). Please add COPYING file to your git-now repository. It benefits git-now users and contributors, I think :smile:

* The specification:
(http://d.hatena.ne.jp/sinsoku/20101208/1291770514)

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追記[2011/10/17]
ライセンスはGPLです