Add .get() and .header() to MockReq
Add .get() and .header() to MockReq

These are methods in Express 3, and should be on the mock request for
consistency.

AnyPresence/sails,Hanifb/sails,konstantinzolotarev/sails,tempbottle/sails,jianpingw/sails,balderdashy/sails,ctartist621/sails,alexferreira/sails,vip-git/sails,hellowin/sails,yinhe007/sails,rlugojr/sails,dylannnn/sails,rlugojr/sails,zand3rs/sails,saronwei/sails,leobudima/sails,winlolo/sails,cazulu/sails,calling/sails,Benew/sails,alex-zhang/sails,janladaking/sails,shaunstanislaus/sails,artBrown/sails,scippio/sails,Josebaseba/sails,tjwebb/sails,vip-git/sails,jianpingw/sails,apowers313/sails,jsisaev1/sails,pmq20/sails,Karnith/sails-for-gulp