minor refactoring, added inc and dec operators

examples/stress.cosmo

@@ -8,8 +8,8 @@ class Test
     end
 end
 
--- stressing the GC
-for (var i = 0; ; i=i+1) do
+// stressing the GC
+for (var i = 0; ; i++) do
     var x = Test("Hello world " .. i)
     x.print()
 end

examples/test.cosmo

@@ -1,7 +1,7 @@
--- crafts a dummy class
+// crafts a dummy class
 class test end
 
--- instance of test
+// instance of test
 var obj = test()
 
 test.__index = function(self, key)
@@ -11,4 +11,4 @@ test.__index = function(self, key)
     end
 end
 
-print(obj["lol"]) -- should print 9001?
+print(obj["lol"]) // should print 9001?