export(Conf) export(Layers) added back to NAMESPACE since iterate_commits.R showing this as difference between the following most recent commit which didn't load Conf and the prior one which did.

committed: 2014-04-02T22:40:43Z
sha: 9733a842916547d74afc37a27a563896e04a4ac9
Conf exists: FALSE

----

committed: 2014-04-02T01:42:40Z
sha: 1d2d58c0cf2f5c8e3dd976c2d220d60a0678e05a
Conf exists: TRUE

hopefully this will do the trick for ohi-science/ohicore#80