Added support for BitBand I/O
Add preliminary support for Cryptographic coprocessor on stm32 F2 and F4
[Style] Coding style fixes.

 * No trailing white spaces
 * No sapces before tabs
 * "int *var" and not "int * var"
[Style] Do not declare new types if not really necessary.
Linker generation script for most of the supported chips
[Style] Removed trailing spaces.
Added compatibility with Cortex-M0 base
Add IRQ definitions for the F0 family

Modified irq2nvic script to make core-dependent includes.
the core: cm0 argument in the yaml file is optional, defaults to cm3, and can be overriden.
Added memory map for stm32/F0 architecture
RCC module for stm32F0 ready for use
Add flash module support into F0 device
Library now compilable
Add support for F0 GPIO (same as for F2 and F4 chips, later rename to f024 to better track changes
Add CRC and PWR shared modules through entire family
Add ignored file
Merge branch 'F0-compat' of ssh://github.com/BuFran/libopencm3 into F0-compat
Merged with origin