Update README: converting svgs to pngs
Update README: converting svgs to pngs

Change-Id: I75a6f0fb66f367d5140ba4d207dbf7de632583a7

carloshwa/apps-android-wikipedia,wikimedia/apps-android-wikipedia,creaITve/apps-android-tbrc-works,parvez3019/apps-android-wikipedia,anirudh24seven/apps-android-wikipedia,anirudh24seven/apps-android-wikipedia,SAGROUP2/apps-android-wikipedia,parvez3019/apps-android-wikipedia,carloshwa/apps-android-wikipedia,SAGROUP2/apps-android-wikipedia,wikimedia/apps-android-wikipedia,BrunoMRodrigues/apps-android-tbrc-work,anirudh24seven/apps-android-wikipedia,creaITve/apps-android-tbrc-works,carloshwa/apps-android-wikipedia,Wikinaut/wikipedia-app,carloshwa/apps-android-wikipedia,reproio/apps-android-wikipedia,anirudh24seven/apps-android-wikipedia,Wikinaut/wikipedia-app,Wikinaut/wikipedia-app,SAGROUP2/apps-android-wikipedia,SAGROUP2/apps-android-wikipedia,creaITve/apps-android-tbrc-works,anirudh24seven/apps-android-wikipedia,Duct-and-rice/KrswtkhrWiki4Android,Wikinaut/wikipedia-app,parvez3019/apps-android-wikipedia,Duct-and-rice/KrswtkhrWiki4Android,BrunoMRodrigues/apps-android-tbrc-work,Duct-and-rice/KrswtkhrWiki4Android,reproio/apps-android-wikipedia,dbrant/apps-android-wikipedia,SAGROUP2/apps-android-wikipedia,BrunoMRodrigues/apps-android-tbrc-work,wikimedia/apps-android-wikipedia,carloshwa/apps-android-wikipedia,dbrant/apps-android-wikipedia,BrunoMRodrigues/apps-android-tbrc-work,parvez3019/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,reproio/apps-android-wikipedia,reproio/apps-android-wikipedia,parvez3019/apps-android-wikipedia,reproio/apps-android-wikipedia,Wikinaut/wikipedia-app,creaITve/apps-android-tbrc-works,Duct-and-rice/KrswtkhrWiki4Android,dbrant/apps-android-wikipedia,dbrant/apps-android-wikipedia,Duct-and-rice/KrswtkhrWiki4Android