new-wxproj, a bash script to create a minimum C++ project

[chenbin.sh]

* key points
- create cmake project files. CMake will create IDE project files or GNU Makefiles based on its own project files.
- minimum main frame application with menu bar.
- The executable on OS X is packaged in a bundle automatically

See https://github.com/redguardtoo/new-wxproj for the code.