[PATCH 0/2] cat-file --literally

These changes introduce a "--literally" option to "cat-file" to
allow us to read the type of any loose object, mostly the ones
created using the "--literally" option of "hash-object".

For now it works with the "-t" option as :

     git cat-object -t --literally <object_sha>

Can be made to work with "-e" and "-s" option in the future.

The first patch adds "sha1_object_type_literally()" which is
called by "cat-object" to print the type.
The second patch adds the "--literally" option to "cat-file".

These patches are in response for the patches made here :
http://thread.gmane.org/gmane.comp.version-control.git/243560/focus=243628