Removed an implict version pin to get dev version of egg recipe.

We're going to need to sort out these version pins.  Or, more likely,
we need to implement something similar in zc.buildout 1.5 :)

src/zc/buildout/buildout.py

@@ -133,7 +133,7 @@ _buildout_1_4_default_versions = {
     # Buildout and recipes that are likely to change to 1.5.0 sooner rather
     # than later.
     'zc.buildout': _buildout_version,
-    'zc.recipe.egg': '1.2.2',
+    # 'zc.recipe.egg': '1.2.2',
     'zc.recipe.testrunner': '1.3.0',
     'z3c.recipe.i18n': '0.7.0',
     'z3c.recipe.tag:': '0.3.0',