Add IntelliJ IDEA CE support; rename IntelliJ IDEA to IntelliJ IDEA U…

…ltimate

Add IntelliJ IDEA CE support

Merge pull request #31 from RyuX51/master

Add support for RubyMine

#30: Add support for RubyMine

Merge pull request #27 from artemy/feature/26-add-rider-support

#26: Add support for Rider

#26: Add support for Rider

(cherry picked from commit 4b47aa1)

Update CONTRIBUTORS.md

Update CONTRIBUTORS.md

Update screenshot and animation, exclude images from bundle, update r…

…eadme

Add versioning to CI (backport)