Alpha release - June 2014 - Update

Updated README.md
installer: Automatically execute device install action on Windows 8.x
coisane: Added UpdateDeviceConfigFlags utility function
coisane: Set flag to display finish-install wizard pages on cancel
wiasane: Respect reference count within ExitScannerSession
wiasane: Do not close session if ADF scan is in progress (#16)
wiasane: Handle multiple SCAN_FIRST calls during ADF load and scan (#16)
wiasane: Skip SCAN_FIRST if ADF is already loaded (#16)