Beautiful urls (#18)

* Added uri property to Page model

* Added aliases collection

* Added routing form aliases

* Fixed redirect after page creation

* Added abiltity to support few pages with same title

* Added ability to change uri manually

* Changed hash function

* Changed uri parsing

* Removed pages controller promise

* Modified page's tests

* Added tests for alias model

* Added tests for aliases

* Escaping special characters

* Added missed files

* Fixed bugs related to translation

* Fixed parent page link

* Added server validation for uri

* Changed css properties order

* Made uri property of page be optional

* Prevented alias creation from empty uri

* Moved alias types to model

src/utils/crypto.js

@@ -0,0 +1,12 @@
+const crypto = require('crypto');
+
+/**
+ * Create binary md5
+ * @param stringToHash - string to hash
+ * @returns {string} - binary hash of argument
+ */
+module.exports = function binaryMD5(stringToHash) {
+  return crypto.createHash('md5')
+    .update(stringToHash)
+    .digest('binary');
+};