py-cartopy: add python 3.4 subport

[pgf]

• Python 3.4 subport added. (might become available with next release)
• geos dependency removed as it is already a dependency of py-shapely. (invalid)

[petrrr]

Cc Me!

[petrrr]

Two quick comments:

• Python 3 support: To my understanding Py3 is still not fully supported by cartopy, it is work in progress. But if you have other information please provide details
• geos: It was listed explicitly as dependency when I created the port. If it comes in only though py-shapely, removing is justified. If it is used directly we need to keep it. Will recheck this.

[petrrr]

There is at least one direct link to `geos:

petr% otool -L /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cartopy/trace.so
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cartopy/trace.so:
	/opt/local/lib/libgeos_c.1.dylib (compatibility version 10.0.0, current version 10.2.0)
	/opt/local/lib/libproj.0.dylib (compatibility version 8.0.0, current version 8.0.0)
	/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 56.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0)

petr% port provides /opt/local/lib/libgeos_c.1.dylib
/opt/local/lib/libgeos_c.1.dylib is provided by: geos

So the dependencies as specified are correct!

Py3 is not supported upstream, so closing for now.

[petrrr]

Reopening as a reminder. Py3 might become available with the next release.