added anchors to enable class containment ordering

added support to fetch exhbitor jar from module files rather than off maven.
this is useful for vagrant etc. scenarios, and where connection to maven
is a problem.

updated init script so that hostname from opts in honoured.
previously hostname was being forced even if specified in opts.
opts now get merged just like exh properties.
this allows ip address to be used instead of hostname if needed (useful for vagrant, etc.)