Change some strings to be more consistent with WP terms; add current_site global to sites_page - thanks, zawszaws

git-svn-id: http://plugins.svn.wordpress.org/networks-for-wordpress/trunk@767325 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge pull request #4 from mgburns/master

Fix path issue for root sites in update_site()
Merge remote-tracking branch 'remotes/trunk'
Translate blog path to new network path. Fixes issue #5 - thanks, mgburns