Added information about WAD (Web App Deployer) into README

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
svdply will now ask just only for domain (first part of it is app name). Fixed passing stage and branch.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>