Fix #236: Hub's home/end keys only work in IE
Fix #236: Hub's home/end keys only work in IE

Due to WinJS's use of IE's -ms-scroll-translation:vertical-to-horizontal,
Hub's support for the home and end keys in IE is provided for free by the
browser.

To get Hub's home and end keys to work in other browsers, they have to be
handled explicitly.

kevinwsbr/winjs,CensoredUser/winjs,nobuoka/winjs,CensoredUser/winjs,KevinTCoughlin/winjs,edrohler/winjs,jmptrader/winjs,KevinTCoughlin/winjs,PaulWells/winjs,grork/winjs,CensoredUser/winjs,KevinTCoughlin/winjs,jmptrader/winjs,GREYFOXRGR/winjs,kevinwsbr/winjs,grork/winjs,IveWong/winjs,rigdern/winjs,ladyinblack/winjs,gautamsi/winjs,nobuoka/winjs,edrohler/winjs,kevinwsbr/winjs,GREYFOXRGR/winjs,ladyinblack/winjs,edrohler/winjs,PaulWells/winjs,PaulWells/winjs,IveWong/winjs,Guadzilah/winjs,Guadzilah/winjs,rigdern/winjs,gautamsi/winjs,Guadzilah/winjs,nobuoka/winjs,gautamsi/winjs,ladyinblack/winjs,IveWong/winjs,grork/winjs,GREYFOXRGR/winjs,jmptrader/winjs,rigdern/winjs