Changing interop to primitives.
Converted.
Use interpreter Strategy class.
Convert strategy externals to prime.
Merge branch 'master' into interop-to-primitive

Conflicts:
	org.metaborg.runtime.task/src/main/java/org/metaborg/runtime/task/primitives/task_api_debug_info_0_1.java
Don't depend on strj.
Merge branch 'master' into interop-to-primitive
Merge branch 'interop-to-primitive'