Gradle build
Add assertions for scope.
Remove unnecessary code.
Refactoring - 1st step.
added gradle wrapper
Merge pull request #35 from mjedynak/master

added gradle wrapper
Make gradle wrapper executable by default.
Small change of presentation in lookup item for function.
Refactoring - 2nd step. Adding test cases.
Closes #4 - Function completion from imported files missing.
Additional fixes of function imports.
Improve test case.
Improving gradle build.
Add instruction on running gradle build.
Improving gradle build.
Cloudbees status.
Refactoring - 3rd step.