remove zsstest, it was move to zss.test already
remove old zssdemo (it looks related to zss 1)
rename zssappdemo to zssdemo
move some unknow test form zssapp/test to zssapp.test/test
migrate zssapp to zss 3.0.0 version
migrate zssdemo to new zssdemo of zss 3.0.0
fix zssapp readonly issue
rewrite ga code