Extend available Syntax Highlighters

[Spartachetto]

Up to now Syntax Highlighting is offered only for some programming languages.

It would be great if the list of programming language is extendable or configurable.

Before doing that it would be great to add to the defaults the few missing languages in the upper right corner of the graph here

As far as I managed to understand the list of languages is defined in files_texteditor/js/editor.js

/** Sets the syntax highlighting for the editor based on the file extension */
setEditorSyntaxMode: function(extension) {
// Loads the syntax mode files and tells the editor
var filetype = [];
// add file extensions like this: filetype["extension"] = "filetype":
filetype["h"] = "c_cpp";
filetype["c"] = "c_cpp";
filetype["clj"] = "clojure";
filetype["coffee"] = "coffee"; // coffescript can be compiled to javascript
filetype["coldfusion"] = "cfc";
filetype["cpp"] = "c_cpp";
filetype["cs"] = "csharp";
filetype["css"] = "css";
filetype["groovy"] = "groovy";
filetype["haxe"] = "hx";
filetype["htm"] = "html";
filetype["html"] = "html";
filetype["tt"] = "html";
filetype["java"] = "java";
filetype["js"] = "javascript";
filetype["jsm"] = "javascript";
filetype["json"] = "json";
filetype["latex"] = "latex";
filetype["tex"] = "latex";
filetype["less"] = "less";
filetype["ly"] = "latex";
filetype["ily"] = "latex";
filetype["lua"] = "lua";
filetype["markdown"] = "markdown";
filetype["md"] = "markdown";
filetype["mdown"] = "markdown";
filetype["mdwn"] = "markdown";
filetype["mkd"] = "markdown";
filetype["ml"] = "ocaml";
filetype["mli"] = "ocaml";
filetype["pl"] = "perl";
filetype["php"] = "php";
filetype["powershell"] = "ps1";
filetype["py"] = "python";
filetype["rb"] = "ruby";
filetype["scad"] = "scad"; // seems to be something like 3d model files printed with e.g. reprap
filetype["scala"] = "scala";
filetype["scss"] = "scss"; // "sassy css"
filetype["sh"] = "sh";
filetype["sql"] = "sql";
filetype["svg"] = "svg";
filetype["textile"] = "textile"; // related to markdown
filetype["xml"] = "xml";