Updating boards and platform definition.

1. Putting the Arduino boards in alphabetical order.
2. Promoting LTO in platform build definition.
3. Correcting documentation of Pinoccio Scout.
4. Adding a full definition of Teensy 2.0.
Update boards definitions.
Correcting Offscreen::get_bitmap(); too much const.
Updating OWI rom print-out; make id a 48-bit hex number.
Add limitation of usage of Timers; classes that cannot be used together.
Add limitation of Timer; should be used with RTC.
Cleanup documentation.
Adjust for Mega.
Adjust telnet server printout to something easier to read.
Testing ERM1602-5 LCD adapter.
Correct compiler warnings.
Add more SD performance information.
Testing Wireless NRF24L01P device driver after SPI update and LTO build.