added left shift, right shift, bitwise xor to keyword.operator and condensed regex match

lib/ace/mode/lsl_highlight_rules.js

@@ -307,7 +307,7 @@ var keywordMapper = this.createKeywordMapper({
                 regex : "[a-zA-Z_$][a-zA-Z0-9_$]*\\b"
             }, {
                 token : "keyword.operator",
-                regex : "!|!=|%|%=|&|&&|<|<=|=|==|>|>=|\\*|\\*=|\\+|\\+=|\\+\\+|\\-|\\-=|\\-\\-|\\/|\\/=|\\||\\|\\||~"
+                regex : "[!%<>=*+\\-\\/]=?|<<|>>|&|&&|\\+\\+|\\-\\-|\\||\\|\\||^|~"
             }, {
                 token : "punctuation.operator",
                 regex : "\\?|\\:|\\,|\\;|\\."