subservers: added option `lk server --no-subservers` and
LKCOREDIR/core/servers is used by default for looking for subservers started
with `lk server`
version push for life_start to 0.3.0 with the following changes:
-  subservers: by default putting new subservers into WORKSPACE_LK/core/servers/
-  adding websocket support so that subservers can register websocket handlers
-  enabling travis tests
version 0.1.14