Use new CMSIS and CMSIS-Atmel packages

Fixes some compile errors and warnings

Speeds up booting when sketch erases application flash on 1200bps touch
reset.

Add I2S support

Add support to link the ARM math (provided by CMSIS tools)

This commit enables PWM on pin 11 instead of pin A4 on MKR1000 improving UNO pinout compatibility

This pachs allows C++ global constructors to run after hardware
initialization. This helps some libraries that setups hardware
in class constructor to work properly.

See also #169

Fix #172

Fixed issue where pins were not being configured properly in analogWrite when multiple channels of the same TCC/TC module were being used to drive outputs.