Xplanet 1.3: adding with-all dependency option

Adding a "with-all" option so that the necessary dependencies installed with Xplanet match Xplanet's default configuration options, namely: PNM support via netpbm, TrueType support via freetype, and PANGOFT2 support via pango. This will not include JPLs CSPICE library since that is not a current formula. Assuming the user has followed the instructions to install and link CSPICE in Homebrew, this updated formula will include
support for that as well.