Fixes issues with autoconf

In particular, it removes any deprecated functionality
wxWidgets only documents their deprecated m4 macros and gives a poor example
Also to note in regard to wxWidgets, I removed any unneeded libraries from the linker line.

Any warning messages provided by autoconf has been supressed in the most appropriate manner possible.
Merge pull request #12 from computerquip/autotools-fix

Fixes issues with autoconf