if widget inactive (widget in Inactive Widgets, instead of sidebar), then not valid for dashboard
dashboard widget not shown, if no valid widget found (see above)

git-svn-id: https://plugins.svn.wordpress.org/toplistcz/trunk@1009666 b8457f37-d9ea-0310-8a92-e5e31aec5664
- widget title update on upgrade from version 3.2
- ToDo list moved to separate file (located in assets)

git-svn-id: https://plugins.svn.wordpress.org/toplistcz/trunk@1009667 b8457f37-d9ea-0310-8a92-e5e31aec5664
prevent admin loging changed from deprecated level-X checks to user roles checks.

git-svn-id: https://plugins.svn.wordpress.org/toplistcz/trunk@1009668 b8457f37-d9ea-0310-8a92-e5e31aec5664
- retrieving all standard statistics (ignoring profi stats for now)
- displaying 4 selected statistics in dashboard widget
- caching of retrieved stats
- if cached stats valid, then sending them immediately to client (not later via ajax)
- graphs drawing using flot
- encrypting password
- no pushing of dashboard widget, if the user has dashboard order defined
- disable input and show spinner on submiting password
- highlighting error in dashboard widget

git-svn-id: https://plugins.svn.wordpress.org/toplistcz/trunk@1009669 b8457f37-d9ea-0310-8a92-e5e31aec5664