Handle class/method/field not found

- added class/or-error variant which raises an error if the class
  doesn't exists
- jlambda-method, jlambda-constructor and jlambda-field raises error if
  method, constructor or field doesnt exists.. ON DEFINITION
- added jlambda-method* variant, which avoid checking until execution,
  useful for library provided methods
Merge branch 'jimport-java-ns' of github.com:chicken-mobile/jni into jimport-java-ns