Pygeopack

This should hopefully fix the bug where solar wind velocity needs to be manually entered in order to convert between coordinate systems.

I recommend updating the parameters using `gp.Params.UpdateParameters()` after installing this code.

Some quite major bugs seem to be fixed here (thanks to Joel for finding them!).

The results of traces differed when switching between models. The only model unaffected was T96. The reason was that the model functions for the other models either implicitly or explicitly declared the inputs as being REAL, when they should have been REAL *8.

This appears to be fixed now...

Fixed bug in UpdateParameters()

Updated Windows DLL to include fixes made in v1.0.1

Fixed some bugs that stopped the parameters being updated!

First release with experimental Windows support!