#6 I make a workaroud to build under MacOSX 10.9

[Yang]

I tried to build gspicegui under macosx.
some problems:

1. wxWidgets-2.8 cannot built under macosx ( complained by macports ), I can only install wxWidgets-3.0

2. pow10 is missing under macosx, I wrote a pow.h to use pow method under macosx.

3. changed WXCFG to use macport

[Yang]

running the binary after built, it complained wxWidgets Debug Alert, but can be suppressed and continued to tun.

see attachement

[Mike W.]

I've made the following changes to the code base :

1. gSpiceUI now compiles and runs using wxWidgets v3.0
2. pow10( ) has been replaced with a macro EXP10( ) which looks for MacOSX
3. the build system now allows the OS to decide which wx-config to use instead of specifying an absolute path

The current code base has bugs in it but you should still be able to test it and see if these bugs have been sorted out.

Thanks for the feedback.