Revert "properly handling loggregator server non200 responses"

This reverts commit 19c420e523fd4fe4070b10ff812d649667fcf781.
Revert "switch from websockets to http chunking"

This reverts commit 20eab6497b049b671fe3f24bf1f8b39f19a265e3.
Switch to celluloid based websockets

Signed-off-by: Stephan Hagemann <stephan@pivotallabs.com>