Merged in the latest version of psock and timer from Contiki

[njh]

Decided to start small and merge in the latest versions of psock and the timer library from Contiki: git://github.com/contiki/contiki-mirror.git

• core/sys/timer.h
• core/sys/timer.c
• core/net/psock.h
• core/net/psock.c

[maniacbug]

Good stuff, keep up the good work. I merged it into my fork, and all is well on those examples too.

[njh]

I will keep going then!

I think biggest change is a lot of changes from u16* to uip_ipaddr_t in functions and macros: https://github.com/contiki/contiki-mirror/blob/master/core/net/uip.h

[njh]

Ugh, this pull request seems to be tied to my HEAD. Shall I start again with a more specific pull request?

[sde1000]

I just pulled njh:master - it was the correct commit anyway.