[ADDED] More Mac fixes and enhancements

[elliswr]

Here is a diff for numerous Mac fixes, code cleanup, GCC compatability, and Mac enhancements (moving the about dialog to the standard Mac App menu location, adding a standard mac help menu and moving the MMEX help menu to that location, etc.)

[Edit]: Someone was kind enough to point out that the search Payees feature had been broken by me. The patch now has the fix for it.

[madhan]

Checked into SVN. 406. Please verify.

[Nikolay]

Hi

Now compilation for MSWindows does not work.

Lines
#define MMEX_ICON_FNAME wxT("mmex.ico")
#define MMEX_SPLASH_FNAME wxT("splash.png")
are apsent in defs.h file.

[madhan]

Thanks Nikolay for catching it.
I think we need people to build and test in a couple of OSes before checking it into SVN. That way we dont break it.
I checked in the fix in 407