fixed eval step type and updated pom

fixes #215

verify, assert, and wait for would fail using se-interpreter to run json tests because the se-builder plugin outputs json such that: 

    {
      "type": "assertEval",
      "script": "return true;",
      "value": "true"
    }

woulds be an assertEvaluation. But the interpreter was looking for the comparator param to be called "title", which resulted in an error.

Also, I updated the POM to show where this build is in relation to the latest build hosted at the sauce labs maven repo:
 http://repository-saucelabs.forge.cloudbees.com/release/com/saucelabs/sebuilder-interpreter/