docs(): update dev setup doc to reflect change from tsd to typings
docs(): update dev setup doc to reflect change from tsd to typings

Closes #291.

s-KaiNet/ng-officeuifabric,rolandoldengarm/ng-officeuifabric,jjczopek/ng-officeuifabric,rolandoldengarm/ng-officeuifabric,andrewconnell/ng-officeuifabric,andikrueger/ng-officeuifabric,s-KaiNet/ng-officeuifabric,ngOfficeUIFabric/ng-officeuifabric,ngOfficeUIFabric/ng-officeuifabric,andikrueger/ng-officeuifabric,rolandoldengarm/ng-officeuifabric,jjczopek/ng-officeuifabric,andrewconnell/ng-officeuifabric,rolandoldengarm/ng-officeuifabric,jjczopek/ng-officeuifabric,andikrueger/ng-officeuifabric,andrewconnell/ng-officeuifabric,s-KaiNet/ng-officeuifabric,andikrueger/ng-officeuifabric,andikrueger/ng-officeuifabric,ngOfficeUIFabric/ng-officeuifabric,ngOfficeUIFabric/ng-officeuifabric,s-KaiNet/ng-officeuifabric,andrewconnell/ng-officeuifabric,jjczopek/ng-officeuifabric,andrewconnell/ng-officeuifabric,jjczopek/ng-officeuifabric,s-KaiNet/ng-officeuifabric,rolandoldengarm/ng-officeuifabric,ngOfficeUIFabric/ng-officeuifabric