Security extension: Whitelist ip

[marcmascarell]

We would like to provide a security by default package.

The 'Whitelist ip' extension should consist of:

• A table with the whitelisted ips
• A middleware that protects access looking at the ip
• An emergency method to access (For example: the client ip changed unexpectedly and he needs to update it, We should be able to grant a one time access with a token or something like that)