Various tweaks to get import ordering to match the ooo convention of putting java and javax imports first, then threerings imports.

* Add importGroups template variable, set to the two groups: one for java, one for threerings.
* Omit Client import the client-side generated code. This was removed some time ago.
* Omit the blanket int -> Integer replacement, this was only needed for the marshaller
* Add the as boxing imports when generating the marshaller (this gets the Integer import for int types in marshaller signatures)
* Change the templates to put space between each group of imports.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6677 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/main/java/com/threerings/presents/tools/ActionScriptUtils.java

@@ -230,7 +230,6 @@ public class ActionScriptUtils
     {
         // replace primitive types with OOO types (required for unboxing)
         imports.replace("byte", "com.threerings.util.Byte");
-        imports.replace("int", "com.threerings.util.Integer");
         imports.replace("boolean", "com.threerings.util.langBoolean");
         imports.replace("[B", "flash.utils.ByteArray");
         imports.replace("float", "com.threerings.util.Float");