added notice that window interface not backwards compat
added notice that window interface not backwards compat

nikolas/splinter,drptbl/splinter,bmcculley/splinter,gjvis/splinter,lrowe/splinter,cobrateam/splinter,gjvis/splinter,gjvis/splinter,drptbl/splinter,nikolas/splinter,cobrateam/splinter,lrowe/splinter,underdogio/splinter,cobrateam/splinter,drptbl/splinter,objarni/splinter,myself659/splinter,nikolas/splinter,lrowe/splinter,bmcculley/splinter,myself659/splinter,objarni/splinter,bmcculley/splinter,underdogio/splinter,myself659/splinter,objarni/splinter,underdogio/splinter