Add versions and version checking to the libraries.

CHANGES.txt

@@ -1,4 +1,4 @@
-NEXT RELEASE
+0.0.4 : 2013-04-14
  - Remove the option definition property.
  - Rename o.extend to o.augment.
  - Rename the default definition property to devoid.
@@ -10,6 +10,7 @@ NEXT RELEASE
  - Added the typeOf type.
  - New arrayOf and objectOf types.
  - New attribute extention (o-attribute.js).
+ - Add versions and version checking to the libraries.
 
 0.0.3 : 2013-03-24
  - New types extension (o-types.js).

o-attribute.js

@@ -2,6 +2,10 @@
     var o = oJS;
     if (!o) throw new Error('...');
 
+    if (o.versions.core !== '0.0.4') throw new Error('...');
+    if (o.versions.types !== '0.0.4') throw new Error('...');
+    o.versions.attribute = '0.0.4';
+
     function ucFirst (str) {
         return str.charAt(0).toUpperCase() + str.slice(1);
     }

o-types.js

@@ -2,6 +2,9 @@
     var o = oJS;
     if (!o) throw new Error('...');
 
+    if (o.versions.core !== '0.0.4') throw new Error('...');
+    o.versions.types = '0.0.4';
+
     function simpleType (func) {
         return function () { return func }
     }

o.js

@@ -3,6 +3,8 @@
     var previousO = root.o;
     var o = {};
 
+    o.versions = { core: '0.0.4' };
+
     // The method in which we export o (and oJS), that works whether in the browseri
     // or Node.js, including noConflict, was graciously copied from underscore.js.
     if (typeof exports !== 'undefined') {