Rename Relations.{memberRefAndInheritanceDeps => nameHashing}

The previous name of the flag was rather specific: it indicated
whether the new source dependency tracking is supported by given Relations
object. However, there will be more functionality added to Relations that
is specific to name hashing algorithm. Therefore it makes sense to name
the flag as just `nameHashing`.

I decided to rename Relations implementation classes to be more
consistent with the name of the flag and with the purpose they serve.

The flag in AnalysisCallback (and classes implementing it) has been
renamed as well.

interface/src/main/java/xsbti/AnalysisCallback.java

@@ -28,8 +28,11 @@ public interface AnalysisCallback
 	* Unreported problems are usually unreported because reporting was not enabled via a command line switch. */
 	public void problem(String what, Position pos, String msg, Severity severity, boolean reported);
 	/**
-	 * Determines whether member reference and inheritance dependencies should be extracted in given compiler
-	 * run.
+	 * Determines whether method calls through this interface should be interpreted as serving
+	 * name hashing algorithm needs in given compiler run.
+	 *
+	 * In particular, it indicates whether member reference and inheritance dependencies should be
+	 * extracted.
 	 *
 	 * As the signature suggests, this method's implementation is meant to be side-effect free. It's added
 	 * to AnalysisCallback because it indicates how other callback calls should be interpreted by both
@@ -38,5 +41,5 @@ public interface AnalysisCallback
 	 * NOTE: This method is an implementation detail and can be removed at any point without deprecation.
 	 *       Do not depend on it, please.
 	 */
-	public boolean memberRefAndInheritanceDeps();
+	public boolean nameHashing();
 }