Add HAL for Freescale KL43Z
Added spi_api.c and gcc_arm_kl43z.tmpl files. Fixed some issues in KL43Z target
[PROJECT.py] sorts targets and toolchains for help option

Sorts targets and toolchains for help option and adds new option -L to
generate the list with possible projects to generate.
Added LPUART support and fixed a many errors in KL43Z target
Added USB Device support for KL43Z
[PROJECT.py] adds cmdline option to use program_name instread of program_id
[PROJECT.py] add option 'clean'

Adds the cmdline option clean (to clean the export folder) and some
minor things (spelling and option order).
[PROJECT.py] removed the sys.exit() after cleaning
Fixed LPUART and USB device initialization issue. Added _kill, _exit and _getpid functions required by gcc-arm-none-eabi-4.8 toolchain.
added USBDevice support for STM32F401RE
[FRDM-K64F] Fix FOPT EzPort bit documentation and set it to disable at start-up to
allow proper booting when powered from the K64F USB port. Refer to issue (#569).
Merge branch 'master' into dev-freescale-kl43z
Merge pull request #579 from bagbag/master

[USB] STM32F401RE - USBDevice support addition
Merge pull request #563 from ohagendorf/cmdlineoptions4project

[PROJECT.py] some additions and minor changes to cmdline options
Host test plugins: First draft with working pluging for mbed (serial sendBreak command for reset)
Host test plugins: Cleaned preliminary code before next round of refactoring and improvements
Host test plugins: Added license and fxed one parsing issue
Host test plugins: added return values to setup() and execute() interface methods
Host test plugins: moved serial port flashing just before plugin reset call
Added support of KL43Z into RTX