use "Walk Like and Egyptian" aka K&R braces for all class definitions

Sublime Text syntax grammar does not do multi-line matching,
so all editors that use this (including Atom and its symbol matching)
cannot detect classes defined as

    MyClass
    {

    }

This also makes all classes in the class lib consistent in style which is nice
for everybody.

sc/EmacsDocument.sc

@@ -15,9 +15,9 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 // USA
 
-EmacsDocument
+EmacsDocument {
 // : Document
-{
+
 	classvar documentMap, <>current;
 	var <>sceld;
 	var title, path;