renamed from multisite overview to network summary
fix #14 - fixed bug with restoring and switching to wrong site
fix #12 and fix #11 - adding posts, pages, description and last post in table
fix #10 - added container around netview shortcode output
fix #9 - html output is now getting cached via wordpress transient api
fix #7 - added display of other shortcodes in own shortcode output. also refactored some html generation
implemented features for r1.1.1