Fix code completion in VS

Fix method overload, so that VS does not get confused on which one to
use
Fix references
Optimize delegate invocation
Optimize condition/action evaluation
More optimization of delegate invocation
Code cleanup
Error handling for condition/action evaluation
Fix duplicate activation

Fix duplicate activation when using rules with identity match (or any
other match when object matches itself)
Code/comments cleanup
Exceptions cleanup
Improve rules load specification
Tests cleanup
Fix visualizer and samples
Initial stab at beta node sharing
Fix debugger visualizer reference
Use hashsets in node memories
Cleanup rete builder
Extend node sharing to all types of nodes
Fix links in the readme
Changed project URL in nuspec