added support for external formatter module

formatter name can be any resolvable (npm) module name or path as used by require()
fixed formatterLoader.ts and ruleLoader.ts CORE folders
* made relative to module.filename (instead of implied working directory)
* resolves rules and formatters correctly when tslint is used by dependents (grunt-tshint etc)
* requires to compile tests to ./build (instead of ./build/test, as module.path is the compiled JS file)
added .gitattributes for fixture line-endings

Gruntfile.js

@@ -13,8 +13,8 @@ module.exports = function(grunt) {
         options: {
           reporter: 'spec'
         },
-        src: ['build/test/**/*.js']
-      },
+        src: ['build/*-tests.js']
+      }
     },
 
     tslint: {
@@ -78,7 +78,7 @@ module.exports = function(grunt) {
           target: 'es5'
         },
         src: ['test/**/*.ts', '!test/files/**/*.ts'],
-        dest: 'build/test/tslint-tests.js'
+        dest: 'build/tslint-tests.js'
       }
     }
   });

bin/tslint-cli.js

@@ -26542,9 +26542,9 @@ var Lint;
     var fs = require("fs");
     var path = require("path");
     var _s = require("underscore.string");
-    var moduleDirectory = path.dirname(module.filename);
 
-    var CORE_RULES_DIRECTORY = path.join("..", "build", "rules");
+    var moduleDirectory = path.dirname(module.filename);
+    var CORE_RULES_DIRECTORY = path.resolve(moduleDirectory, "..", "build", "rules");
 
     function loadRules(ruleConfiguration, rulesDirectory) {
         var rules = [];
@@ -26662,8 +26662,7 @@ var Lint;
     var _s = require("underscore.string");
 
     var moduleDirectory = path.dirname(module.filename);
-
-    var CORE_FORMATTERS_DIRECTORY = path.join("..", "build", "formatters");
+    var CORE_FORMATTERS_DIRECTORY = path.resolve(moduleDirectory, "..", "build", "formatters");
 
     function findFormatter(name, formattersDirectory) {
         var camelizedName = _s.camelize(name + "Formatter");
@@ -26680,7 +26679,7 @@ var Lint;
             }
         }
 
-        return undefined;
+        return loadFormatterModule(name);
     }
     Lint.findFormatter = findFormatter;
 
@@ -26701,6 +26700,16 @@ var Lint;
 
         return undefined;
     }
+
+    function loadFormatterModule(name) {
+        var src;
+        try  {
+            src = require.resolve(name);
+        } catch (e) {
+            return undefined;
+        }
+        return require(src).Formatter;
+    }
 })(Lint || (Lint = {}));
 var TypeScript;
 (function (TypeScript) {
@@ -55662,7 +55671,6 @@ var TypeScript;
             FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
             FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
             FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
-
             FormattingRequestKind[FormattingRequestKind["FormatOnPaste"] = 5] = "FormatOnPaste";
         })(Formatting.FormattingRequestKind || (Formatting.FormattingRequestKind = {}));
         var FormattingRequestKind = Formatting.FormattingRequestKind;
@@ -55695,7 +55703,6 @@ var TypeScript;
             RuleAction[RuleAction["Ignore"] = 0] = "Ignore";
             RuleAction[RuleAction["Space"] = 1] = "Space";
             RuleAction[RuleAction["NewLine"] = 2] = "NewLine";
-
             RuleAction[RuleAction["Delete"] = 3] = "Delete";
         })(Formatting.RuleAction || (Formatting.RuleAction = {}));
         var RuleAction = Formatting.RuleAction;
@@ -55740,7 +55747,6 @@ var TypeScript;
     (function (Formatting) {
         (function (RuleFlags) {
             RuleFlags[RuleFlags["None"] = 0] = "None";
-
             RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
         })(Formatting.RuleFlags || (Formatting.RuleFlags = {}));
         var RuleFlags = Formatting.RuleFlags;
@@ -56319,7 +56325,6 @@ var TypeScript;
             RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
             RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
             RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-
             RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
         })(Formatting.RulesPosition || (Formatting.RulesPosition = {}));
         var RulesPosition = Formatting.RulesPosition;