tox.ini: Add .eggs to norecursedirs

This prevents py.test from trying to run tests in the .eggs directory, which
setuptools can create.

tox.ini

@@ -1,6 +1,5 b''
 [pytest]
-norecursedirs = kallithea/tests/scripts .tox
-
+norecursedirs = kallithea/tests/scripts .tox .eggs
 
 [tox]
 envlist = py{26,27}-{pytest,nose}