EnumContent; log level can be selected from a popup list. New EnumContent, with code to load translations in Items. Editable as an AStringContent. Hacked OptionsMisc to use an EnumContent. Implemented a EnumContentWidget providing a pop-up list to select from (still needs improving). Moved IContent to its own module. ContentExceptions thrown via WDCCheck now. Fixed a small bug with reloading translations.

--- a/mde/gui/exception.d	Sat Dec 06 17:41:42 2008 +0000
+++ b/mde/gui/exception.d	Sat Dec 13 12:54:43 2008 +0000
@@ -48,6 +48,9 @@
     this () {
         super ("Unexpected content type");
     }
+    this (Object o) {	// Default, by Widget class's this / WDCCheck
+	super ("Unexpected content type for "~o.classinfo.name);
+    }
     this (char[] msg) {
         super (msg);
     }