Add configuration (config.h) file and helpers for a debug console

config.h: General configuration options
blackbox.h: Helpers functions and definitions for debugging over a console.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Implement a debug console over UART0

Implement a debug console to allow sending debug messages.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
console: Insert a carriage return on newline

Do not use \n\r to terminate lines. It is ugly. Instead, automatically
insert a carriage return ('\r') before every line feed ('\n').

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Stellaris: Style fixes (Trivial)

Fixes to make indent -linux stop complaining.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
gitignore: Ignore KDevelop generated files (Trivial)

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>