Merge branch 'master'

Merge branch 'master'

* master:
  Add howto about separating topics.
  Merge branch 'pb/repo'
  Add support for explicit type specifiers when calling git-repo-config
  Merge branch 'jc/fixdiff'
  diff-tree: do not default to -c
  Avoid using "git-var -l" until it gets fixed.
  t5500: adjust to change in pack-object reporting behaviour.
  Only call git-rerere if $GIT_DIR/rr-cache exists.
  Use a relative path for SVN importing
  fetch-clone progress: finishing touches.
  Fix fetch-clone in the presense of signals
  Make "git clone" pack-fetching download statistics better
  Make "git clone" less of a deathly quiet experience