Update 0.9.1 for Windows

This update fixes GPSD client connection bugs (possible crashes).
It improves the interface a little bit.

The program is available in:

• Windows x86 32 bits (MinGW 5.3 - no extra package required)
• Windows x86 64 bits (MSVC 2013 - redistribuable may be required)

Older versions are useless and their use is discouraged.