State of the art BDD library, naive implementation, and Hybrid-approach available in the first beta-release version 0.2.0
* ADD biodivine as an obdd library to adf-obdd
* Implement restrict-wrapper on Biodivine
* Testcases changed to use biodivine for grounded.
* API unified
* ADD stable and complete with biodivine
* moved main.rs to bin folder
* ADD biodivine -> naive translation
* ADD hybrid approach
instantiation + grounded by biodivine, then naive approach with memoization
* TIDY Readme, doc, tests
Implements #12
* Implement Stable Models based on lazy evaluated iterators
* Adjustment of the internal computation of the grounded interpretation
* Update build.rs to replace "@" in test-instance names with "at"
* Implement de-/serialization of the adf (in OBDD representation) in library
* Adjust tests
* Add more style-restrictions to compiler