Added -v argument

Author: dbrgn

.bumpversion.cfg

@@ -1,5 +1,5 @@
 [bumpversion]
 current_version = 0.1.0
-files = setup.py
+files = setup.py coverage_badge/__main__.py
 commit = True
 tag = True

coverage_badge/__main__.py

@@ -14,6 +14,9 @@
     coverage = None
 
 
+__version__ = '0.1.0'
+
+
 class Devnull(object):
     """
     A file like object that does nothing.
@@ -51,6 +54,8 @@ def parse_args():
             help='Save the file to the specified path.')
     parser.add_argument('-q', dest='quiet', action='store_true',
             help='Don\'t output any non-error messages.')
+    parser.add_argument('-v', dest='print_version', action='store_true',
+            help='Show version.')
     return parser.parse_args()
 
 
@@ -86,6 +91,11 @@ def main():
     """
     args = parse_args()
 
+    # Print version
+    if args.print_version:
+        print('coverage-badge v{}'.format(__version__))
+        sys.exit(0)
+
     # Check for coverage
     if coverage is None:
         print('Error: Python coverage module not installed.')