ECLiPSe Prolog syntax.

Here is a first version of a YAML file for #15 (and the .tmLanguage file).
There are some duplicates with the pure-Prolog YAML file.
The ideal would be to only redefine some rules from the repository of Prolog in ECLiPSe Prolog (builtin and controlandkeywords).
But, unlike TextMate, Sublime Text doesn't appear to support syntax injection.