* Added skeleton code for reliable files and buffer vectors
* Added deep_copy method to Knowledge Record
* Added usage of deep_copy to get functions in Knowledge_Base_Impl and Variables classes.
  * This should prevent issues with ref-counted knowledge records getting out of sync when knowledge record instances are being referenced within user threads
* Updated to version 1.7.1

git-svn-id: http://madara.googlecode.com/svn/trunk@1319 2850746a-f1c8-11dd-b507-8b4ecd5210be