Upgrade to Stash 3.3.0

Starting from 3.3.0, Atlassian upgraded Tomcat from 7 to 8.
Tomcat 8 removed JasperListener

> Initialize the JSP runtime in Jasper's initializer to avoid need for a
> Jasper-specific lifecycle listener. JasperListener has been removed. (jboynes)

From Stash 3.2.0, Atlassian changed the config path location to an
enclosing folder called `shared`
https://confluence.atlassian.com/display/STASHKB/Upgrading+your+Stash+home+directory+for+Stash+3.2+manually

For Stash Backup Client, Atlassian changed download path starting from
1.2.1.

Hope this will fix #35