Write java signature of serialized descriptors efficiently

Instead of storing a string with the signature, write the name, return type and
parameter types separately, reusing the name table. Refactor the name table to
allow it to store not only names of Kotlin entities, but also arbitrary names
and fq-names

compiler/tests/org/jetbrains/jet/descriptors/serialization/AbstractDescriptorSerializationTest.java

@@ -76,7 +76,10 @@ public abstract class AbstractDescriptorSerializationTest extends KotlinTestWith
         @NotNull
         @Override
         public List<AnnotationDescriptor> loadCallableAnnotations(
-                @NotNull ClassOrNamespaceDescriptor container, @NotNull ProtoBuf.Callable callableProto
+                @NotNull ClassOrNamespaceDescriptor container,
+                @NotNull ProtoBuf.Callable proto,
+                @NotNull NameResolver nameResolver,
+                @NotNull AnnotatedCallableKind kind
         ) {
             throw new UnsupportedOperationException(); // TODO
         }