Release v1.6.2

BUG FIXES:

• Accept Arbitrary String for User OData's __id.(#98)
• Box installation can not create file directly under the box.(#125)

IMPROVEMENTS:

• It cannot know a connecting WebSocket state.(#120)
• Put an upper limit on derived number of times from a source event.(#123)
• Convert scheme of X-Personium-Box-Schema header from personim-localunit to https in ExecAction.(#127)