update copyright date 2006->2007 darcs-hash:20070527203458-5007d-80f992bc5501d433301d462f9d4b0f5f8403b7a1.gz
copyright notices/updates darcs-hash:20060723064753-5007d-e1917a77b2f86898c05160d112fe2ab0a7af12b2.gz
checkpoint darcs-hash:20060716071939-5007d-1943bc593f4c5f6b1f5fa38a3412812ee9f200de.gz
checkpoint darcs-hash:20060715054215-5007d-ed3fe5a5c10e09772e1c29240f113fde77b99623.gz