Added static IP config option

• The portal now gives the option of configuring static IP details (IP address, gateway, subnet, dns server).
• The Wifi (No Scan) option not longer exists in the portal

Free up some extra resources used by AP after it is removed

The library was holding on to the extra end point handlers needed by the config portal and the buffers used to hold the list of available SSIDs.

Add 'connect()' method

Add a connect() method that will force the wifi manager to attempt to reconnect to the router. This is useful if the router details are changed from outside of the wifi manager (for example if you're you're using improv).

Initial release

Initial release