Negate "censor" variable
Merge pull request #24 from transmart/issues/wrong-censoring-variable-interpretation

Negate "censor" variable
Filter out censored patients.
Add more exact description for censoring variable.
Do not censor by default.
Fix potential error in commented code.
Merge pull request #25 from transmart/issues/wrong-censoring-variable-interpretation

Issues/wrong censoring variable interpretation
No censor. by default:Change test case accordingly