Revert "disable annotations that don't currently compile"

This reverts commit bb82e90b7b60cedad56acbced2789a8054391ba1.

They now compile, so let's put them back in
fix annotations with metamodel references
Revert "temporarily comment out see() annotations due to NPE in backend"

This reverts commit d61312830fcb3db51397f4b279b1523feb553c24.

Conflicts:
	src/ceylon/language/Ranged.ceylon
	src/ceylon/language/String.ceylon

These annotations now compile again
fixed invalid metamodel annotations
exception: can't use metamodel literal to non-shared member
String: string is gone
print: no syntax for object member literals yet