Frustum bug fix: clone and constructor should be real copies.  Fix bug in unit test to catch this in the future.
update math constructors to not copy when provided explicit initial values per @mrdoob: https://github.com/mrdoob/three.js/pull/2902#issuecomment-11999928
Merge remote-tracking branch 'bhouston/frustum-fix' into dev
Update builds.