JetBrains license added.
Autoimport tests created.
.recommenders folder added to .gitignore.
Autoimport duplication fixed.

 #KT-5360 Fixed
Most of methods are now static. New method for creating source files with specified packages.
Performing multifile tests, multifile test added to testData.
Multifile tests without parameters.
Merge pull request #53 from adkozlov/autoimport-fix

Autoimport fix