Added Async stress test
Added Async stress test

arlm/sqlite-net,igrali/SQLite.Net-PCL,praeclarum/sqlite-net,JAgostoni/sqlite-net,daynin/net-sqlite,Applied-Duality/sqlite-net,koush/sqlite-net,daynin/net-sqlite,jorik041/sqlite-net,koush/sqlite-net,peterhuene/sqlite-net,CutFlame/sqlite-net,pedropaf/sqlite-net,mattleibow/SQLite.Net-PCL,fernandovm/SQLite.Net-PCL,CutFlame/sqlite-net,oysteinkrog/SQLite.Net-PCL,caseydedore/SQLite.Net-PCL,haithemaraissia/sqlite-net,peterhuene/sqlite-net,TiendaNube/SQLite.Net-PCL,kreuzhofer/SQLite.Net-PCL,molinch/SQLite.Net-PCL,igrali/SQLite.Net-PCL,nicolehaugen79/sqlite-net,Y-Less/sqlite-net,ericsink/sqlite-net