add grunt task for coverage

.gitignore

@@ -1,2 +1,2 @@
 node_modules/
-config.js
+coverage

Gruntfile.js

@@ -0,0 +1,38 @@
+module.exports = function(grunt) {
+
+    grunt.initConfig({
+        default: {
+
+        },
+        jasmine_node: {
+            coverage: {
+                options : {
+                    failTask: true,
+                    branches: 60 ,
+                    functions: 60,
+                    statements: 60,
+                    lines: 60
+                }
+            },
+            options: {
+                forceExit: true,
+                match: '.',
+                matchall: false,
+                extensions: 'js',
+                specNameMatcher: 'spec',
+                junitreport: {
+                    report: false,
+                    savePath : "./build/",
+                    useDotNotation: true,
+                    consolidate: true
+                },
+                unit: ['./spec/'],
+                functional: ['./spec/']    
+            }
+        }
+    });
+
+    grunt.loadNpmTasks('grunt-jasmine-node-istanbul');
+    grunt.registerTask('default', 'jasmine_node');
+
+};

package.json

@@ -17,6 +17,7 @@
     "yandex-speech": "^0.0.11"
   },
   "devDependencies": {
+    "grunt-jasmine-node-istanbul": "0.0.5",
     "jasmine": "^2.2.1"
   },
   "scripts": {
@@ -32,4 +33,4 @@
     "url": "https://github.com/antirek/voicer/issues"
   },
   "homepage": "https://github.com/antirek/voicer"
-}
+}