`py-load-pycomplete' only makes sense if Pymacs is loaded
Bogus dedent when typing colon in dictionary literal, lp:1197171, fixed

wrong guess for py indent offset due to backslash, lp:852052, again
Don't impose `py-set-load-path'

Call `py-set-load-path' only if `py-guess-py-install-directory-p' is non-nil