WAForth2C: Experiment to use WAForth to convert Forth to C

Uses WAForth to generate WebAssembly modules, passes them to wasm2c, and compiles and loads everything together into a native binary.

Usage

Create a .f file with a main word defined (e.g. example/sieve.f)
Compile
```
 ./waforth2c.js examples/sieve.f
```
This will generate .wasm files for all the defined words.
Build
```
 make
```
This will generate .c files from the .wasm files generated in 2., and build them using the C compiler.
Run
```
 ./main
```