fixed css, sequenceConfig, and ganttConfig being sent as buffer to phantomjs

made verbose cli argument a boolean

lib/cli.js

@@ -29,7 +29,7 @@ function cli(options) {
         , css: 't'
         , width: 'w'
       }
-    , 'boolean': ['help', 'png', 'svg']
+    , 'boolean': ['help', 'png', 'svg', 'verbose']
     , 'string': ['outputDir']
   }
 
@@ -94,25 +94,38 @@ cli.prototype.parse = function(argv, next) {
     else {
       options.png = true
     }
-
+  
     if (options.sequenceConfig) {
-      options.sequenceConfig = checkConfig(options.sequenceConfig)
+      try {
+        fs.accessSync(options.sequenceConfig, fs.R_OK)
+      
+      } catch (err) {
+        this.errors.push(err)
+      }
+    } else {
+      options.sequenceConfig = null
     }
-
+  
     if (options.ganttConfig) {
-      options.ganttConfig = checkConfig(options.ganttConfig)
+      try {
+        fs.accessSync(options.ganttConfig, fs.R_OK)
+      
+      } catch (err) {
+        this.errors.push(err)
+      }
+    } else {
+      options.ganttConfig = null
     }
 
     if (options.css) {
       try {
-        options.css = fs.readFileSync(options.css, 'utf8')
-
+        fs.accessSync(options.css, fs.R_OK)
 
       } catch (err) {
         this.errors.push(err)
       }
     } else {
-        options.css = fs.readFileSync(path.join(__dirname, '..', 'dist', 'mermaid.css'))
+        options.css = path.join(__dirname, '..', 'dist', 'mermaid.css')
     }
 
     // set svg/png flags appropriately
@@ -136,17 +149,6 @@ cli.prototype.parse = function(argv, next) {
   }
 }
 
-function checkConfig(configPath) {
-  try {
-    var text = fs.readFileSync(configPath, 'utf8');
-    JSON.parse(text)
-    return text
-  } catch (e) {
-      console.log(e);
-    return null;
-  }
-}
-
 function createCheckPhantom(_phantomPath) {
   var phantomPath = _phantomPath
     , phantomVersion