CamlDBM version 1.3

• Clean up the C stubs; use CAML_NAME_SPACE
• Install dbm.cmx (#13, #14)

CamlDBM version 1.2

• Use the GDBM interface when the NDBM interface is not available
• Look for include files in /usr/local/include as well

CamlDBM version 1.1

• Applied 3 patches from OPAM package for v1.0
• Migration to Github.