Several improvements

* Run `mysql_upgrade` during MySQL upgrade with `wo stack upgrade` to perform migration if needed
* WordOps now check if a repository already exist before trying to adding it again.
* install script refactored

wo/core/domainvalidate.py

@@ -25,7 +25,6 @@ class WODomain():
         return domain_name
 
 
-
     def getlevel(self, domain):
         """
             Returns the domain type : domain, subdomain and the root domain