Add relative directory parsing

As of now, when using `-r' or `-R', relative directories can be used.
This *does not* include locations starting with `~', those still need
to be handled by your shell.

Because every repo is treated as a possible relative path, and thus
passed on to `realpath', the paths have become very uniform.  This
means that it will now only register and unregister paths that don't
have a trailing `/'.  This is not true during usage, so those paths
still work, but they can't be removed by gitto, and adding them again
will create a duplicate entry.

* gitto/Makefile (objects): Add `path.scm' and `path.go'.

  (.PHONY): Add `all' as a phony target.

  (all): New target, compiles all `.go' targets.

  ($(filter %.go,$(objects))): Use `env' to run guild so that include
  paths are setup properly.

* gitto/main.scm (gitto): Use new `(gitto path)' module, it contains
  the `realpath' function.

  (register-repository):
  (remove-repository): Always pass REPOSITORY through `realpath' and
  use the result.

* gitto/path.scm: New file. Loads the `libguile-gitto-path' extension
  and exports its `realpath' function.

* src/Makefile (CFLAGS):
  (LDFLAGS): Use `pkg-config' to gather the necessary values for guile.

  (libguile-gitto-path.so): New guile extension, wraps the `readline'
  POSIX function.

* src/gitto-path.c: New file, wraps and exports the `realpath' POSIX
  function from `stdlib.h'.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/.gitignore b/src/.gitignore
new file mode 100644
index 0000000..9d22eb4
--- /dev/null
+++ b/src/.gitignore
@@ -0,0 +1,2 @@
+*.o
+*.so