doc(readme): add note for IE users
doc(readme): add note for IE users

At present there is a bug in the HTMLImports polyfill which only occurs
on IE. We have submitted a pull request to the team with the fix. In
the mean time, if you want to test on IE, you can work around the issue
by explicitly adding a script tag before you load system.js.

telekosmos/skeleton-navigation-foundation,jdanyow/aurelia-typescript-skeleton,michaelcolenso/hello-newman,talves/aurelia-skeleton-navigation,ne0guille/skeleton-navigation,jdanyow/skeleton-navigation,arlobelshee/SCIence,sergeyb12345/skeleton-navigation,giabao/tinyui-doc,CharlesPockert/aurelia-bs-grid-demo,zewa666/skeleton-navigation,bohnen/aurelia-skeleton-navigation-gulp-typescript,Exsilium122/skeleton-navigation,roguePanda/skeleton-navigation-polymer,un33k/skeleton-navigation,shanonvl/skeleton-navigation,giabao/tinyui-doc,xiwc/skeleton-navigation,PWKad/aurelia-modal,hitesh97/skeleton-navigation,zartata/aurelia-reporter,maggiben/aurelia,aaronroberson/skeleton-navigation,ahmedshuhel/skeleton-nav,clkao/aurelia-redux-todo,bradbarrow/sitepoint-aurelia-app,forsmyr/aurelia-samples,aaronroberson/skeleton-navigation,IdemIsDito/3d-cart,sitepoint-editors/sitepoint-aurelia-app,delebash/skeleton-navigation,cmichaelgraham/aurelia-typescript-skeleton,Enrapt/aurelia-skeleton-navigation-gulp-typescript,cwbit/skeleton-navigation,abbasmhd/ui-aurelia,tungptvn/tungs-skeleton-navigation,bohnen/skeleton-navigation,sgimeno/aurelia-skeleton,jedd-ahyoung/aurelia-reddit,niieani/skeleton-navigation-typescript,giabao/khi-nha-kinh,akauppi/skeleton-navigation,r14r-work/fork_aurelia_samples,martingust/ref-issue,sgimeno/aurelia-skeleton,tungptvn/tungs-skeleton-navigation,xiwc/aurelia.skeleton.v0.17.test,Maidan-hackaton/ua-tenders-aurelia,mbroadst/skeleton-navigation,giabao/khi-nha-kinh,sitepoint-editors/aurelia-reporter,xiwc/aurelia-skeleton-navigation-v20,davismj/aurelia-session-example,kawanchai/myweb,Gizra/hedley-client-aurelia,vortispy/rensyu-animation,ahmedshuhel/skeleton-navigation,stephenlautier/skeleton-navigation,davismj/skeleton-navigation-login-shell,jameshibbard/aurelia-reddit-client,cwbit/skeleton-navigation,GMU1/Elite,maggiben/aurelia,giabao/tinyui-doc,Enrapt/aurelia-skeleton-navigation-gulp-typescript,bryanrsmith/skeleton-navigation,mbroadst/skeleton-navigation,theRemix/skeleton-navigation,martingust/ref-issue,milunka/redirect-problem,cmichaelgraham/aurelia-typescript-skeleton,ne0guille/skeleton-navigation,h4ki/skeleton-navigation,vortispy/rensyu-animation,majdalwajeeh/skeleton-navigation,dewdad/skeleton-navigation-polymer,a-oishi/aurelia-samples,zewa666/skeleton-navigation,aaronroberson/skeleton-navigation,DJCordhose/skeleton-navigation,shanonvl/skeleton-navigation,sitepoint-editors/aurelia-reddit-client,martingust/virtual-list,KoanInk/skeleton-navigation,giabao/khi-nha-kinh,alvistar/aurelia_mbed,Knight-Owl-Studios/htfup,hitesh97/skeleton-navigation,wallabyjs/skeleton-navigation,zartata/aurelia-reporter,tonypee/skeleton-navigation,Exsilium122/skeleton-navigation,r14r/fork_aurelia_samples,Exsilium122/skeleton-navigation,tregusti/skeleton-navigation,zartata/aurelia-reporter,akauppi/skeleton-navigation,h4ki/skeleton-navigation,arlobelshee/SCIence,scharfmedia/testified-email-app,kawanchai/v1,Siecje/payout-front,stephenlautier/skeleton-navigation,niieani/skeleton-navigation-typescript,bryanrsmith/skeleton-navigation,jdanyow/aurelia-typescript-skeleton,tibor19/Recipe-aurelia-playground,tregusti/skeleton-navigation,forsmyr/aurelia-samples,valichek/skeleton-navigation,theRemix/skeleton-navigation,CharlesPockert/aurelia-bs-grid-demo,davismj/skeleton-navigation,spideynr/nickrossolatos,voidberg/aurelia-redux-todo,wallabyjs/skeleton-navigation,Thanood/skeleton-navigation-polymer,niieani/skeleton-navigation-typescript,sitepoint-editors/sitepoint-aurelia-app,sitepoint-editors/aurelia-reporter,tungptvn/tungs-skeleton-navigation,zewa666/skeleton-navigation,Exsilium122/skeleton-navigation,PWKad/aurelia-samples,r14r-work/fork_aurelia_samples,ahmedshuhel/skeleton-navigation,abbasmhd/ui-aurelia,ctoran/skeleton-navigation,ahmedshuhel/skeleton-navigation,Thanood/skeleton-navigation-polymer,zewa666/aurelia-skeleton-ie9,Siecje/payout-front,npelletm/np-jdanyow-skeleton-navigation,behzad88/skeleton-navigation,zewa666/aurelia-reporter,michaelcolenso/hello-newman,joelcoxokc/ui-aurelia,martingust/virtual-list,sitepoint-editors/aurelia-reporter,kawanchai/v1,PWKad/aurelia-modal,xiwc/aurelia.skeleton.v0.17.test,bohnen/skeleton-navigation,ne0guille/skeleton-navigation,ilovelili/skeleton-navigation,telekosmos/skeleton-navigation-foundation,roguePanda/skeleton-navigation-polymer,amitaibu/skeleton-navigation,ErykB2000/skeleton-navigation,Enrapt/aurelia-skeleton-navigation-gulp-typescript,tonypee/skeleton-navigation,alvistar/aurelia_mbed,cmichaelgraham/aurelia-typescript-skeleton,bradbarrow/sitepoint-aurelia-app,sitepoint-editors/aurelia-reddit-client,gavinaiken/skeleton-navigation,wallabyjs/skeleton-navigation,zewa666/skeleton-navigation,davismj/skeleton-navigation-login-shell,ErykB2000/skeleton-navigation,wallabyjs/skeleton-navigation,behzad88/aurelia-breeze-sample,jdanyow/aurelia-examples,zewa666/aurelia-skeleton-ie9,IdemIsDito/3d-cart,jdanyow/skeleton-navigation,aaronroberson/skeleton-navigation,clkao/aurelia-redux-todo,valichek/skeleton-navigation,zewa666/aurelia-reporter,majdalwajeeh/skeleton-navigation,DJCordhose/skeleton-navigation,voidberg/aurelia-redux-todo,jdanyow/skeleton-navigation,ctoran/skeleton-navigation,milunka/redirect-problem,davismj/skeleton-navigation,jdanyow/aurelia-examples,zewa666/aurelia-reporter,Knight-Owl-Studios/htfup,talves/aurelia-skeleton-navigation,SAAirey/aurelia-attached-bug,ahmedshuhel/skeleton-navigation,r14r/fork_aurelia_samples,xiwc/aurelia-skeleton-navigation-v20,scribeGriff/skeleton-navigation,tungptvn/tungs-skeleton-navigation,sergeyb12345/skeleton-navigation,davismj/aurelia-session-example,SAAirey/aurelia-skeleton-navigation-bundling,jdanyow/aurelia-typescript-skeleton,behzad88/aurelia-examples,bohnen/aurelia-skeleton-navigation-gulp-typescript,Gizra/hedley-client-aurelia,gavinaiken/skeleton-navigation,KoanInk/skeleton-navigation,a-oishi/aurelia-samples,jdanyow/aurelia-breeze-sample,scharfmedia/testified-email-app,bohnen/aurelia-skeleton-navigation-gulp-typescript,tibor19/Recipe-aurelia-playground,decademoon/aurelia-router-activation,kawanchai/myweb,jdanyow/skeleton-navigation,jdanyow/aurelia-breeze-sample,scribeGriff/skeleton-navigation,ilovelili/skeleton-navigation,Maidan-hackaton/ua-tenders-aurelia,PWKad/aurelia-samples,xiwc/skeleton-navigation,npelletm/np-jdanyow-skeleton-navigation,behzad88/aurelia-examples,un33k/skeleton-navigation,delebash/skeleton-navigation,KoanInk/skeleton-navigation,decademoon/aurelia-router-activation,amitaibu/skeleton-navigation,jameshibbard/aurelia-reddit-client,GMU1/Elite,SAAirey/aurelia-attached-bug,niieani/skeleton-navigation-typescript,dewdad/skeleton-navigation-polymer,sgimeno/aurelia-skeleton,spideynr/nickrossolatos