Wx 3.0 blitzmann

Hey,

After wxPython 3.0 hit Debian Jessie and wxPython 2.8 removed it's impossible to run Pyfa under it. I found issue #92 and some blitzmann's code regarding it. I've rebased his code on top of current master and made some additional little adjustments.

Please verify everything is ok and merge this into mainline. If something is wrong - let me know i'll fix it.