Merge branch 'feature-coap-temp' of github.com:Ell-i/Runtime into feature-coap-temp

# By Pekka Nikander
# Via Pekka Nikander
* 'feature-coap-temp' of github.com:Ell-i/Runtime:
  Correct problem with SPI constructors, now executed at compile time
  Refactor SPI and CoAP libraries towards Arduino IDE 1.5 compatibility
  Temp size reduction.  Tested, ping works
  Temp size reduction
  Temp size reduction
Adds pin name documenting asciiart
Merge branch 'feature-coap-temp' of github.com:Ell-i/Runtime into feature-coap-temp