ccnl: use a second helper thread to handle e.g. timeouts
ccnl: use vtimer instead of rtc
ccnl: make theRelay use dynamic memory
ccnl: make relay start on RIOT startup
ccnl: use stacksize main for all threads
ccnl: prevent race condition on teardown
ccnl: adapt HOWTO to new features
ccnl: finish rebase
examples: changed stacksize to the recommended value
doc: mainpage.txt fixed minor mistake
native: clean up and clarify help

- reorder option details to mirror the order given in usage
- list option arguments in option details
- clarify option arguments
cpu: added support for the i.MX6
board: added support for the RIoTboard
pkg: added imx6_SDK-package

It contains slightly modified sources from the i.MX6-platform-SDK
pkg: added riotboard_SDK-package

It contains slightly modified sources from the i.MX6-platform-SDK