fix copy of array options

do not modify option object of caller
Merge branch 'master' of https://github.com/cherbst/express-restify-mongoose into cherbst

# By Christoph Herbst
# Via Christoph Herbst
* 'master' of https://github.com/cherbst/express-restify-mongoose:
  fix copy of array options
fix: test was broken
* release 0.5.2