version bump, requirement of kerying >= 0.3

setup.py

@@ -1,5 +1,5 b''
 
-version = '0.4.2'
+version = '0.4.3'
 
 try:
 	from setuptools import setup, find_packages
@@ -31,6 +31,6 b' setup('
 		'Topic :: Software Development :: Libraries :: Python Modules',
 		'Topic :: Software Development :: Version Control'
 		],
-	install_requires = ['keyring'],
+	install_requires = ['keyring>=0.3'],
 	zip_safe = True,
 	)