Add IntelliJ content type to project Info. Add missing resources to targets.

This is required for intelliJ pants plugin to correctly mark the source, resource, test target and test resources.

The constants are defined here in IntelliJ
http://grepcode.com/file_/repository.grepcode.com/java/ext/com.jetbrains/intellij-idea/13.0.0/com/intellij/openapi/externalSystem/model/project/ExternalSystemSourceType.java/?v=source

Testing Done:
Locally ./pants tests/python/pants_test/tasks:depmap passes

https://travis-ci.org/pantsbuild/pants/builds/33880605

Reviewed at https://rbcommons.com/s/twitter/r/964/