RIOT-OS/RIOT — pull request #300 by kaspar030 (2013-11-04 16:08:29+00:00)
Title: shell: refactor default shell command handling

before, we actually duplicated code for handling of shell commands
supplied to shell_init and those hardcoded by MODULE_SHELL_COMMANDS.

This patch refactors shell.c find_handler and print_help so there's
no duplicated code.