Merge pull request #53 from parrt/master

Fixes #51 and Fixes #52.
Merge pull request #54 from parrt/master

Created ANTLR Tool output window that pops up when parser generation has errors / warnings.
untrack .idea
Merge branch 'master' of github.com:antlr/intellij-plugin-v4

Conflicts:
	.idea/copyright/profiles_settings.xml