docs(karma): add note about why externals are defined
docs(karma): add note about why externals are defined

ahthamrin/kbri-admin2,warcraftlfg/warcrafthub-client,larsdolvik/portfolio,k2data/react-redux-starter-kit,jarirepo/simple-ci-test-app,gabrielmf/SIR-EDU-2.0,pawelniewie/zen,vasekric/regrinder,wswoodruff/strangeluv-native,flftfqwxf/react-redux-starter-kit,rickyduck/pp-frontend,jhash/jhash,hustlrb/yjbAdmin,rui19921122/StationTransformBrowserClient,z0d14c/system-performance-viewer,Ryann10/hci_term,arseneyr/yt-party,bhoomit/formula-editor,flftfqwxf/react-redux-starter-kit,jakehm/mapgame2,piu130/react-redux-gpa-app,commute-sh/commute-web,rwenor/react-ci-app,anthonyraymond/react-redux-starter-kit,BigRoomStudios/strangeluv,paulmorar/jxpectapp,bhoomit/formula-editor,flftfqwxf/react-redux-starter-kit,pachoulie/projects,fhassa/my-react-redux-start-ki,janoist1/route-share,Dylan1312/pool-elo,Edmondton/weather-forecasts,febobo/react-redux-start,nodepie/react-redux-starter-kit,parkgaram/solidware-mini-project,przeor/ReactC,sljuka/buzzler-ui,treeforever/voice-recognition-photo-gallary,theosherry/mx_pl,miyanokomiya/b-net,RequestTimeout408/alba-task,rbhat0987/funfunapp,learningnewthings/funfunapp,alukach/react-map-app,loliver/anz-code-test,KNMI/GeoWeb-FrontEnd,davezuko/wirk-starter,wilwong89/didactic-web-game,willthefirst/book-buddy,kolpav/react-redux-starter-kit,treeforever/voice-recognition-photo-gallary,crssn/funfunapp,atomdmac/roc-game-dev-gallery,jarirepo/simple-ci-test-app,Vaishali512/mysampleapp,pawelniewie/czy-to-jest-paleo,roychoo/upload-invoices,dingyoujian/webpack-react-demo,jaronoff97/listmkr,TestKitt/TestKittUI,Dimitrievskislavcho/funfunfuncReduxCI,cohenpts/CircleCITut,far-fetched/kiwi,flftfqwxf/react-redux-starter-kit,pptang/ggm,nivas8292/myapp,sonofbjorn/circle-ci-test,weixing2014/iTodo,rrlk/se2present,MingYinLv/blog-admin,OlivierWinsemius/circleci_test,billdevcode/spaceship-emporium,EngineerMostafa/CircleCI,SHBailey/echo-mvp,popaulina/grackle,tylerbarabas/bbTools,levsero/planning-app-ui,3a-classic/score,nkostelnik/blaiseclicks,neverfox/react-redux-starter-kit,eunvanz/flowerhada,ethcards/react-redux-starter-kit,levkus/react-overcounters2,rickyduck/pp-frontend,janoist1/route-share,MingYinLv/blog-admin,KirillSkomarovskiy/light-it,houston88/housty-home-react,rbhat0987/funfunapp,flftfqwxf/react-redux-starter-kit,larsdolvik/portfolio,SteveHoggNZ/Choice-As,shuliang/ReactConventionDemo,anthonyraymond/react-redux-starter-kit,gohup/react_testcase,bhj/karaoke-forever,rui19921122/StationTransformBrowserClient,maartenlterpstra/GeoWeb-FrontEnd,dannyrdalton/example_signup_flow,cohenpts/CircleCITut,yangbin1994/react-redux-starter-kit,maartenlterpstra/GeoWeb-FrontEnd,nodepie/react-redux-starter-kit,Edmondton/weather-forecasts,popaulina/grackle,pptang/ggm,weixing2014/iTodo,miyanokomiya/b-net,PalmasLab/palmasplay,shuliang/ReactConventionDemo,SteveHoggNZ/Choice-As,ptim/react-redux-starter-kit,Dylan1312/pool-elo,duongthien291291/react-redux-starter-kit-munchery-theme,tylerbarabas/bbTools,atomdmac/roc-game-dev-gallery,OlivierWinsemius/circleci_test,oliveirafabio/wut-blog,gribilly/react-redux-starter-kit,B1ll1/CircleCI,flftfqwxf/react-redux-starter-kit,michaelgu95/ZltoReduxCore,lf2941270/react-zhihu-daily,kolpav/react-redux-starter-kit,ptim/react-redux-starter-kit,parkgaram/solidware-mini-project,flftfqwxf/react-redux-starter-kit,neverfox/react-redux-starter-kit,VladGne/Practice2017,sljuka/buzzler-ui,aibolik/my-todomvc,PalmasLab/palmasplay,arseneyr/yt-party,nkostelnik/blaiseclicks,techcoop/techcoop.group,commute-sh/commute-web,aibolik/my-todomvc,jeffaustin81/cropcompass-ui,lodelestra/SWClermont_2016,GreGGus/MIMApp,febobo/react-redux-start,michaelgu95/ZltoReduxCore,diMosellaAtWork/GeoWeb-FrontEnd,ahthamrin/kbri-admin2,tonyxiao/segment-debugger,jhash/jhash,yangbin1994/react-redux-starter-kit,Stas-Buzunko/cyber-school,tonyxiao/segment-debugger,Stas-Buzunko/cyber-school,armaanshah96/lunchbox,KirillSkomarovskiy/light-it,j3dimaster/CircleCi-test,flftfqwxf/react-redux-starter-kit,oliveirafabio/wut-blog,roslaneshellanoo/react-redux-tutorial,rwenor/react-ci-app,jhardin293/style-guide-manager,longseespace/quickflix,theosherry/mx_pl,BigRoomStudios/strangeluv,3a-classic/score,baronkwan/ig_clone,dingyoujian/webpack-react-demo,codingarchitect/react-counter-pair,gohup/react_testcase,przeor/ReactC,levsero/planning-app-ui,diMosellaAtWork/GeoWeb-FrontEnd,pawelniewie/czy-to-jest-paleo,TestKitt/TestKittUI,andreasnc/summer-project-tasks-2017,crssn/funfunapp,davezuko/react-redux-starter-kit,tkshi/q,rrlk/se2present,simors/yjbAdmin,jhardin293/style-guide-manager,flftfqwxf/react-redux-starter-kit,z0d14c/system-performance-viewer,bhj/karaoke-forever,hustlrb/yjbAdmin,lodelestra/SWClermont_2016,tkshi/q,eunvanz/flowerhada,KNMI/GeoWeb-FrontEnd,eunvanz/flowerhada,baronkwan/ig_clone,codingarchitect/react-counter-pair,okmttdhr/aupa,levkus/react-overcounters2,maartenlterpstra/GeoWeb-FrontEnd,lf2941270/react-zhihu-daily,paulmorar/jxpectapp,flftfqwxf/react-redux-starter-kit,ethcards/react-redux-starter-kit,techcoop/techcoop.group,k2data/react-redux-starter-kit,duongthien291291/react-redux-starter-kit-munchery-theme,flftfqwxf/react-redux-starter-kit,vasekric/regrinder,filucian/funfunapp,Sixtease/MakonReact,corbinpage/react-play,flftfqwxf/react-redux-starter-kit,SHBailey/echo-mvp,flftfqwxf/react-redux-starter-kit,youdeshi/single-page-app-best-practice-client,eunvanz/handpokemon2,roychoo/upload-invoices,alukach/react-map-app,corbinpage/react-play,andreasnc/summer-project-tasks-2017,pachoulie/projects,gReis89/sam-ovens-website,flftfqwxf/react-redux-starter-kit,KNMI/GeoWeb-FrontEnd,chozandrias76/responsive-sesame-test,Ryann10/hci_term,EngineerMostafa/CircleCI,dannyrdalton/example_signup_flow,wilwong89/didactic-web-game,Vaishali512/mysampleapp,flftfqwxf/react-redux-starter-kit,dmassaneiro/integracao-continua,rui19921122/StationTransformBrowserClient,roslaneshellanoo/react-redux-tutorial,Dimitrievskislavcho/funfunfuncReduxCI,dkushner/ArborJs-Playground,fhassa/my-react-redux-start-ki,VinodJayasinghe/CircleCI,NguyenManh94/circle-ci,youdeshi/single-page-app-best-practice-client,janoist1/universal-react-redux-starter-kit,RequestTimeout408/alba-task,maartenplieger/GeoWeb-FrontEnd,jaronoff97/listmkr,gabrielmf/SIR-EDU-2.0,billdevcode/spaceship-emporium,B1ll1/CircleCI,okmttdhr/aupa,houston88/housty-home-react,VinodJayasinghe/CircleCI,j3dimaster/CircleCi-test,pawelniewie/zen,maartenplieger/GeoWeb-FrontEnd,flftfqwxf/react-redux-starter-kit,nivas8292/myapp,kolyaka006/imaginarium,kolyaka006/imaginarium,filucian/funfunapp,flftfqwxf/react-redux-starter-kit,ahthamrin/kbri-admin2,longseespace/quickflix,Sixtease/MakonReact,Sixtease/MakonReact,NguyenManh94/circle-ci,z0d14c/system-performance-viewer,gribilly/react-redux-starter-kit,learningnewthings/funfunapp,chozandrias76/responsive-sesame-test,dmassaneiro/integracao-continua,dkushner/ArborJs-Playground,davezuko/react-redux-starter-kit,longseespace/quickflix,willthefirst/book-buddy,warcraftlfg/warcrafthub-client,flftfqwxf/react-redux-starter-kit,davezuko/wirk-starter,sonofbjorn/circle-ci-test,chozandrias76/responsive-sesame-test,loliver/anz-code-test,jakehm/mapgame2,gReis89/sam-ovens-website,jeffaustin81/cropcompass-ui,armaanshah96/lunchbox,jaronoff97/listmkr,VladGne/Practice2017,pawelniewie/czy-to-jest-paleo,far-fetched/kiwi,simors/yjbAdmin,chozandrias76/responsive-sesame-test,eunvanz/handpokemon2,flftfqwxf/react-redux-starter-kit,GreGGus/MIMApp