With this, test/object is now passing.  Yay!

Revealed many bugs in the (untested and known buggy) user_data
support.

Getting the hang of how to cleanly use gtest.

Update to http://unicode.org/iso15924

Fixes some of the test failures in test-unicode with ICU.  Still
one more to fix before the test passes.

Use with --verbose to see what's failing

ICU fails for now.

Wraps around glib for convenience and ease of use.

Will be adding font_funcs subclassing instead.

Should be all set now.

Because the following loop overflows:

  while (size > new_allocated)
      new_allocated += (new_allocated >> 1) + 32;