PHP/MySQL/CSS Document Management System

Basically, I need a Document Management System that provides the basic functions of this type of systems. I have a design document that displays, in more detail, how the system should work. This document should be delivered to the Freelancer that wins the work. • Create ‘Users’ and ‘Groups’ o ‘Default Users’ (any employee of the company) o ‘Admin Users’ (IT personnel from the same company) o ‘Groups’ (groups of users or more groups) • Manage permission sets‘Access Control Lists’ (ACL’s) o ‘None’ (cannot see documents, folders not name of objects) o ‘See Name’ (can only see object names, cannot open nor click them) o ‘Read’ (can open documents and see objects) o ‘Modify metadata’ (can modify metadata, change object name, etc.) o ‘Write’ (can modify document content) o ‘Delete’ (only owners can delete documents or folders) • Allow to apply ‘Permission Sets’ (ACL’s) to Cabinet, Folders and Documents. • Allow to create ‘Company’ (only ‘Admin users’). Company name cannot exceed 20 characters long. • Allow to create ‘Cabinet’ (only ‘Admin Users’) • Allow to create ‘Folders’ (if the user is the owner of a folder or have ‘Write’ or ‘Delete’ access in an specific location) • Allow to upload, open and download documents (if the user has Read/Write permissions) • Document names cannot exceed 60 characters long; the system should recommend to use the ‘Description field to be more descriptive’. • Allow to see document'metadata' o Default metadata (Properties): object name, description, format, size, creation date, modify date, etc. • Support uploading document versions of existing documents (if the user has Read/Write permissions). • Provide a 'WebDav' component for Copy/Paste and Drag/Drop files from Windows desktop. • Allow to search documents selecting their metadata. The DMS should be based on the following components: • MySQL database: For metadata information • A File Server: To file company data (folders and files) • A Web Server (PHP pages): Where the user and employees work. o HTML o PHP for all functions o CSS for Styles Sheets (in the document I provide an example almost exactly of how I want pages to be designed) o Javascript for 'Functions' button (this button activates the submenu for Cabinets, Folders and Documents) • Web Browser by default should be Internet Explorer 10, second choice is Google Chrome • No DLL files should be created