Add dmrC as a feature in Ravi

[dibyendumajumdar]

dmrC project allows JIT compilation of C code. Since both dmrC and Ravi rely upon LLVM, it is possible to combine the two, by allowing Ravi code to compile stuff written in C. Additionally having dmrC as a sub-module will allow other features such as parsing C code and examining symbols declared in C code

[niaow]

So could we use this to parse header files in order to auto-generate bindings to a C library at runtime?

[dibyendumajumdar]

That is certainly what I hope. There is still a lot of work to do to make that happen.