draft: update Plus1Request
restruct HtmlBannerDownloader, Plus1BannerAsker
resolve lot of deprecated issues
log exception, cs
send all data as post form
rm not used class imports
add two methods to asker and bannerView
remove deprecated mark for close button logic
use HtmlBannerInfo in HtmlBannerDownloader
remove stuff
+InitRequestLoader class, change Plus1BannerDownloadListener interface, +addRequestProperty() method
requestUrl for init request
cs
move common loader logic to abstract BaseRequestLoader
change example app
add reinit-request handler logic
add ChangeSdkPropertiesListener, restruct loader listener interfaces
move doInBackground to abstract class
notify listeners for changes of sdk parameters
add SdkParameter and SdkAction enums