adds tests for modelUtils
add linefeed
add tests for fetching a constructor from _classMap
Added postinstall command, to always have latest and greatest copy of rendr in examples.
Merge pull request #279 from lusini/add-tests-for-modelUtils

Add tests for modelUtils
Merge pull request #261 from alexindigo/postinstall

Added postinstall command, to always have latest and greatest copy of rendr in examples.