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/database/index.js

@@ -1,4 +1,5 @@
 const pages = require('./pages');
+const aliases = require('./aliases');
 const pagesOrder = require('./pagesOrder');
 
 /**
@@ -144,5 +145,6 @@ class Database {
 module.exports = {
   class: Database,
   pages: new Database(pages),
+  aliases: new Database(aliases),
   pagesOrder: new Database(pagesOrder)
 };