add suport for 'nwdisable' and fix security origin

Fix #534
Read package.json correctly when it starts with '..'

Fix #627
[test] test case for strat app

  relate to #627
bump mac version to 0.5.0
Merge pull request #628 from owenc4a4/test

[test] test case for strat app
[README] Update for 0.5.0 RC2