Updating change log

Version bump to 2.1.5.3 - Changing to Treetop 1.4.5 as a gem dep and …

…removing the vendor

Version bump to 2.1.5.2

Version bump to 2.1.5.1

Updating changelog

Updating change log and version number bump

Updating version to 2.1.2

Merge branch 'master' into tmm1

Fixing observer support so any observer can only be added once

Fixed body so that it will init on anything that responds to join fir…

…st or then to_s to handle arrays