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.