Slight improvement in viewEngine d.ts.
Slight improvement in viewEngine d.ts.

davismj/Durandal,davismj/Durandal,BlueSpire/Durandal,Craga89/Durandal,rwhepburn/Durandal,Craga89/Durandal,rwhepburn/Durandal,davismj/Durandal,mryellow/Durandal,Craga89/Durandal,rwhepburn/Durandal,mryellow/Durandal,Craga89/Durandal,BlueSpire/Durandal,davismj/Durandal,BlueSpire/Durandal,rwhepburn/Durandal,BlueSpire/Durandal,mryellow/Durandal,mryellow/Durandal