object access API
=================
-Talk about <sha1_file.c> and <object.h> family, things like
+Talk about <sha1-file.c> and <object.h> family, things like
* read_sha1_file()
* read_object_with_reference()
* has_sha1_file()
* write_sha1_file()
-* pretend_sha1_file()
+* pretend_object_file()
* lookup_{object,commit,tag,blob,tree}
* parse_{object,commit,tag,blob,tree}
* Use of object flags