This cleans things up significantly in the source tree and makes this easier to
manage longer term. In the next few commits, we'll migrate the build to CMake in
prep for packaging support.
- Move bindings into bindings
- Move system configs and misc files into etc
- Move LCD apps into contrib/
- Move all source files into srcs
- Rename helper extensions to match GNU extension naming, fix the #includes as
well
- Adjust Makefile to be less verbose and more programmatic
