Refactoring.

1. Rework build system - new simple makefiles work in all popular
make programs.

2. Remove autocrap (autotools related stuff).

3. Make libefp simpler to use - just add all .c files from src
directory to your project or link with libefp.a.

4. Prefix all exported symbols in libefp.a with efp_ to avoid name
collisions.

5. Move web stuff out of main source tree.