Add missing interrupt enable
[NUCLEO_F401RE] Add hal files
[NUCLEO_F401RE] Add cmsis files
[NUCLEO_F103RB] Update mapping file.

Solve compilation error with flash.
[NUCLEO_F401RE] Many corrections on pinmap, RTC, ...
[NUCLEO_F401RE] Add Cube F4 driver V1.0.0RC2
[NUCLEO_F401RE] Add toolchain_arm_micro files
Merge pull request #161 from bcostm/master

Add NUCLEO_F401RE, improvements