cc3000 hostdriver with the mbed socket interface

Dependents:   cc3000_hello_world_demo cc3000_simple_socket_demo cc3000_ntp_demo cc3000_ping_demo ... more

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Missing IRQ and various fixes

Added mbed ethernet library functions, get ip, gateway and sub mask functions. Added enabled flag so we know when the module is enabled. Smart config tweaks Added David's IRQ checking before re-enabling the IRQ.; Modified the is_connected function, connect + dhcp are needed Added inet_ntoa_r to the socket class, not sure this is the best place, but other conversion functions live here. ( Needed for mbed ethernet functions)

Kojto CC3000 Hostdriver With Mbed Socket interface CC3000MOD