Documentation changes: added Git tutorial, removed Subversion tutorial and updated multiple references from Subversion to Git and from SourceForge to Kaldi's own web site or GitHub as appropriate.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4926 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

Update COPYING notice to further clarify our conventions regarding copyright and multiple authors; update Apache headers to point to COPYING notice.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@2988 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

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git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@1173 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

git-svn-id: https://svn.code.sf.net/p/kaldi/code/sandbox/karel@739 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

git-svn-id: https://svn.code.sf.net/p/kaldi/code/sandbox/discrim@436 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

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git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@218 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@215 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8