[IPHONEAPP-642] fixed bug when checking for the edge of the comparison view paging 	added comments to describe process
[IPHONEAPP-642] fixed bug when checking for the edge of the comparison view paging
	added comments to describe process

MIT-Mobile/MIT-Mobile-for-iOS,smartcop/MIT-Mobile-for-iOS,xNUTs/MIT-Mobile-for-iOS,MIT-Mobile/MIT-Mobile-for-iOS,xNUTs/MIT-Mobile-for-iOS,smartcop/MIT-Mobile-for-iOS