Save last index of fresh abstraction state variable with node
Rewriting k-inductive step procedure
New messages to maintain state about properties
Rewritten and functorized messaging module
New messaging and rewritten BMC
BMC rewritten
Documentation
New messages in some more modules
All modules use the new messages
Inductive step procedure uses properties as tenative invariants
Merge pull request #80 from chsticksel/master

Rewritten BMC and inductive step