bottle pyside and shiboken against system Python

pyside and shiboken can be built against system Python and imported with
Homebrew's Python; use `option "without-python"` instead of `depends_on
:python` in order to bottle against system Python so we don't install
Homebrew's python unnecessarily.
pyside: add 1.2.2 bottle.
shiboken: update 1.2.2 bottle.