add gitignore
add gitignore

Microsoft/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK,Microsoft/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK,bahados/ProjectOxford-ClientSDK