Duplicated WP_Screen object into new WP_Screen_admin class to allow
for backwards compatibility of help content and integration with
screen options
Pulling latest changes from master repository
Merge of Changes for Overview in newly named files
Merge pull request #8 from ninnypants/tooltip_fix

Tooltip fixes
adds banners. thanks @ubernaut!
bumps version, adds notes
Adds help overview (rough). Thanks @mdbitz!

Adds first pass at help overview (some bugs)
bumps version