Added links to WODI , Rosetta Code ,Rust-Lang and Fix Issue#18 & #21

The title says it all.

//Edit : Fixes [Issue#18](https://github.com/rizo/awesome-ocaml/issues/18)
//Edit2 : Fixes [Issue#21](https://github.com/rizo/awesome-ocaml/issues/21)
//Edit3: Added [NekoLanguage](http://nekovm.org) - Source http://caml.inria.fr/cgi-bin/hump.en.cgi?sort=0&browse=88
//Edit4: Added [QuickC--](https://github.com/nrnrnr/qc--), a now dead target language and [others](http://caml.inria.fr/cgi-bin/hump.en.cgi?sort=0&browse=88)