* Load Git command functions itself.
* Can't access the git-svn switch lexical any more, but its only used by
Git::SVN::Log so turn it into a Git::SVN::Log global.
* Load Git::SVN as needed. No need to load it always, its only used twice.
* Moved a state variable to the routine it's used for. (Drive by refactoring)
Signed-off-by: Eric Wong <normalperson@yhbt.net>