Documentation Update
Remove some dangling whitespace
Update README
Fix typo introduced into a Kconfig file in the last few days.  Thanks to Sebastien Lorquet
Fix all yahoo links.  From Magnus Templing
Update document and README
SAM3/4: Fix error serial TERMIOS ioctl handling
Costmetic changes -- spacing, comments.
EFM32: Changes picked up from Pierre's repository
EFM32: Add timer header file
EFM32: Add ACMP header file
EFM32: Add LETIMER header file
EFM32:  Add watchdog header file
EFM32:  Add AES header file
EFM32:  Add RTC header file
EFM32:  Add VCMP header file
EFM32:  Add EMU header file
EFM32:  Add RMU header file
EFM32: Add PCNT header file
EFM32:  Add PRS header file