Pass silent and verbose flags to evalEnv.

bin/lessc

@@ -13,6 +13,7 @@ var options = {
     yuicompress: false,
     optimization: 1,
     silent: false,
+    verbose: false,
     lint: false,
     paths: [],
     color: true,
@@ -173,6 +174,8 @@ var parseLessFile = function (e, data) {
         } else if(!options.lint) {
             try {
                 var css = tree.toCSS({
+                    silent: options.silent,
+                    verbose: options.verbose,
                     ieCompat: options.ieCompat,
                     compress: options.compress,
                     yuicompress: options.yuicompress,

lib/less/env.js

@@ -34,6 +34,8 @@
     };
 
     var evalCopyProperties = [
+        'silent',      // whether to swallow errors and warnings
+        'verbose',     // whether to log more activity
         'compress',    // whether to compress
         'ieCompat',    // whether to enforce IE compatibility (IE8 data-uri)
         'strictMaths', // whether maths has to be within parenthesis