[improvement] Round maintainability value

Author: slyg

src/analyse.js

@@ -33,7 +33,7 @@ module.exports = function analyse (fileRef){
         escapedPath     : fileRef.replace(/\\/g, '\\'), // windows use
         complexity      : report.aggregate.cyclomatic,
         lineNumber      : report.aggregate.sloc.logical,
-        maintainability : report.aggregate.halstead.effort,
+        maintainability : Math.round(report.aggregate.halstead.effort),
         halstead        : {
           length         : report.aggregate.halstead.length,
           vocabulary     : Math.round(report.aggregate.halstead.vocabulary),

test/expectations/complex-tree-results.json

@@ -5,15 +5,15 @@
       "escapedPath": "test/fixture/complex/jquery/jquery-2.0.3.js",
       "complexity": 1468,
       "lineNumber": 4432,
-      "maintainability": 84188538.2899597,
+      "maintainability": 84188538,
       "halstead": { "length": 28743, "vocabulary": 1648, "difficulty": 274, "bugs": 102 }
     },
     {
       "path": "test/fixture/complex/jquery/min/jquery-2.0.3.min.js",
       "escapedPath": "test/fixture/complex/jquery/min/jquery-2.0.3.min.js",
       "complexity": 1195,
       "lineNumber": 2825,
-      "maintainability": 104949017.78561088,
+      "maintainability": 104949018,
       "halstead": { "length": 28696, "vocabulary": 1262, "difficulty": 355, "bugs": 99 }
     },
     {