Copyright notice fixed.

Copyright notice fixed.
(G_LOG_DOMAIN): Changed to "Pango-M17N-FC".
(fontset): New variable.
(init_module): Delete local variable fontset.
(fini_module): Unref fontset.
(m17n_scripts): Add many scripts.
(m17n_fc_get_family): New function.
(m17n_fc_lookup_fontset): New function.
(m17n_fc_free_font_info): New function.
(m17n_fc_get_font): New function.
(m17n_fc_engine_shape): Fix prototype.
(m17n_fc_engine_shape): use m17n_fc_get_font.  Fix geometry
calculation.
(m17n_fc_engine_covers): Use m17n_fc_get_font and
m17n_fc_lookup_fontset.