added signatures for missing API functions in Java. The implementation is still missing

src/runtime/java/org/grammaticalframework/pgf/Concr.java

@@ -69,6 +69,9 @@ public class Concr {
 	 */
 	public native List<MorphoAnalysis> lookupMorpho(String sentence);
 	
+	/** Creates an iterable over the full form lexicon in the grammar */
+	public native Iterable<FullFormEntry> fullFormLexicon();
+
 	/** Returns an iterable enumerating all words in the lexicon
 	 * starting with a given prefix.
 	 * @param prefix the prefix of the word.
@@ -83,6 +86,8 @@ public class Concr {
 	 */
 	public native boolean hasLinearization(String fun);
 
+	public native String graphvizParseTree(Expr expr);
+
 	/** returns the print name for that function or category.
 	 */
 	public native String getPrintName(String id);

src/runtime/java/org/grammaticalframework/pgf/PGF.java

@@ -68,6 +68,9 @@ public class PGF {
 	 * of the expression together with its type */
 	public native TypedExpr inferExpr(Expr expr) throws TypeError;
 
+
+	public native String graphvizAbstractTree(Expr expr);
+
 	//////////////////////////////////////////////////////////////////
 	// private stuff
 	private Pool pool;

src/runtime/java/org/grammaticalframework/pgf/Type.java

@@ -15,6 +15,8 @@ public class Type {
 
 	public native String toString();
 	
+	public native static Type readType(String s);
+
 	//////////////////////////////////////////////////////////////////
 	// private stuff