Merge branch 'extract-remaining' of git://git.bogomips.org/git-svn

* 'extract-remaining' of git://git.bogomips.org/git-svn: Extract Git::SVN::GlobSpec from git-svn. Move Git::IndexInfo into its own file. Load all the modules in one place and before running code. Extract Git::SVN::Migration from git-svn. Prepare Git::SVN::Migration for extraction from git-svn. Extract Git::SVN::Log from git-svn. Prepare Git::SVN::Log for extraction from git-svn.