Bump to version 0.8.0

Author: n-rodriguez

lib/punching_bag/version.rb

@@ -7,8 +7,8 @@ def self.gem_version
 
   module VERSION
     MAJOR = 0
-    MINOR = 6
-    TINY  = 1
+    MINOR = 8
+    TINY  = 0
     PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')