Merge branch 'jc/gitpm'

Merge branch 'jc/gitpm'

* jc/gitpm: (52 commits)
  Remove -fPIC which was only needed for Git.xs
  Git.pm: Kill Git.xs for now
  Revert "Make it possible to set up libgit directly (instead of from the environment)"
  Revert "Git.pm: Introduce fast get_object() method"
  Revert "Convert git-annotate to use Git.pm"
  Fix compilation with Sun CC
  pass DESTDIR to the generated perl/Makefile
  Eliminate Scalar::Util usage from private-Error.pm
  Convert git-annotate to use Git.pm
  Git.pm: Introduce fast get_object() method
  Make it possible to set up libgit directly (instead of from the environment)
  Work around sed and make interactions on the backslash at the end of line.
  Git.pm: Introduce ident() and ident_person() methods
  Convert git-send-email to use Git.pm
  Git.pm: Add config() method
  Use $GITPERLLIB instead of $RUNNING_GIT_TESTS and centralize @INC munging
  INSTALL: a tip for running after building but without installing.
  Perly Git: make sure we do test the freshly built one.
  Git.pm: Don't #define around die
  Git.xs: older perl do not know const char *
  ...