expose less global variables

some dependencies are exposed as global variables, also this is not
needed. Those should be exposed via the current context, instead.

Author: johnyb

.jshintrc

@@ -20,10 +20,6 @@
 
 	"globals": {
 		"define": true,
-        "mimefuncs" : true,
-        "mimetypes" : true,
-        "punycode" : true,
-        "addressparser" : true,
         "console": true,
 		"describe": true,
 		"it": true,
@@ -37,4 +33,4 @@
         "before": true,
         "self": true
 	}
-}
+}

src/mailbuild.js

@@ -26,7 +26,7 @@
     } else if (typeof exports === 'object') {
         module.exports = factory(require('mimefuncs'), require('mimetypes'), require('punycode'), require('wo-addressparser'));
     } else {
-        root.mailbuild = factory(mimefuncs, mimetypes, punycode, addressparser);
+        root.mailbuild = factory(root.mimefuncs, root.mimetypes, root.punycode, root.addressparser);
     }
 }(this, function(mimefuncs, mimetypes, punycode, addressparser) {
     'use strict';
@@ -727,4 +727,4 @@
     };
 
     return MimeNode;
-}));
+}));