Without knowing your cgminer settings, this is something I found in your logfile:
[20/03/2014 12:57:06] No pools set in config file or arguments! If I need to restart the miner it will be stuck at prompt until you manually enter this information. Putting this into the config file or arguments is highly recommended to ensure continuous mining.
Acutally cgminer stopped working and cgwatcher tried to restart without having a pool to mine on it seems.