RIOT-OS/RIOT — pull request #1632 by kaspar030 (2014-09-02 16:46:27+00:00)
Title: core: msg: introduce blip_try_send

We have ```blip_receive``` and ```blip_try_receive```, but ```blip_send(..., bool block)```.
This unifies the API and splits ```blip_send``` into ```blip_send``` (blocking) and ```blip_try_send``` (non-blocking).

Based on #1631.