Refactoring; Contrapositon works!

* remove errorstate and abstractstate
* parameterization of interpreter (related) classes
* interpreter.data package
* finished Rule and ProofScriptCommandBuilder
* VariableAssignment use Variable as key data type
* Contrapositon as test case
3 jobs for master in 2 minutes and 29 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed build #14132

00:00:38

passed deploy #14134

00:01:15

failed test #14133

00:00:35

 
Name Stage Failure
failed
test Test There is an unknown failure, please try again
[ERROR] Please refer to /builds/xt9634/ProofScriptParser/target/surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
ERROR: Job failed: exit code 1