Wakeup outgoing connection selector if necessary.

Immediately wake up selector after connect trigger and
subscribe/unsubscribe write requests.
Wakeup incoming connection selector if buffer becomes available.
Don't sleep in AbstractDeserializer.

Don't wait in AbstractDeserializer if no buffer data is available from
network. IncommingConnectionThread does it already (in a better way).
use buffer immediately in deserializer if available
fixes #6 (NPE because ChainUpdate for an edge arrives before the respective edge reporter
announcement)
Merge branch 'wakeup-selector' of https://github.com/derSascha/stratosphere-streaming into github-master
Merge branch 'latency-improvements' of https://github.com/derSascha/stratosphere-streaming into github-master
restructure and api adjustments for ioctask

prototype chainable method in ioctask

new api for ioctask + restructure

first working prototype with chainable ioctasks

cleaned up changes on chainable ioctasks

renamed IocTask