Changed expressions that deal with count() results to Number because Postgres

in its burning desire to support the amazing four hundred billion rows, returns
a Long for count expressions.

Clients using selectCount() won't be impacted, but clients doing more complex
counting are going to have to sprinkle in some .intValue() calls.

src/main/java/com/samskivert/depot/Funcs.java

@@ -57,7 +57,7 @@ public class Funcs
      * Creates an aggregate expression that counts the number of rows that match the other clauses
      * in this query.
      */
-    public static FluentExp<Integer> countStar ()
+    public static FluentExp<Number> countStar ()
     {
         return new Count(Exps.literal("*"));
     }
@@ -66,7 +66,7 @@ public class Funcs
      * Creates an aggregate expression that counts the number of rows from the supplied
      * expression. This would usually be used in a FieldOverride and supplied with a ColumnExp.
      */
-    public static FluentExp<Integer> count (SQLExpression<?> expr)
+    public static FluentExp<Number> count (SQLExpression<?> expr)
     {
         return new Count(expr);
     }
@@ -76,7 +76,7 @@ public class Funcs
      * supplied expression. This would usually be used in a FieldOverride and supplied with a
      * ColumnExp.
      */
-    public static FluentExp<Integer> countDistinct (SQLExpression<?> expr)
+    public static FluentExp<Number> countDistinct (SQLExpression<?> expr)
     {
         return new Count(expr, true);
     }

src/main/java/com/samskivert/depot/impl/expression/AggregateFun.java

@@ -41,7 +41,7 @@ public abstract class AggregateFun<T> extends OneArgFun<T>
         }
     }
 
-    public static class Count extends AggregateFun<Integer> {
+    public static class Count extends AggregateFun<Number> {
         public Count (SQLExpression<?> argument) {
             this(argument, false);
         }