* Removed ACE condition usage from the Timed_Executor, as it does not appear to be working properly on Linux.
* Implemented condition in the control plane of the Timed_Executor
* Implemented terminated condition in the control plane of the Timed_Executor instead of in a volatile bool
* Updated to version 1.5.1

git-svn-id: http://madara.googlecode.com/svn/trunk@1205 2850746a-f1c8-11dd-b507-8b4ecd5210be