Add .Elapsed in context.ResponseWriter for monitor purpose

With this commit we can record per requests's elapsed time,
so we can easy to monitor that by use a filter.

#3192 AddTestSnakeString

Fix #3192

Lock

Fix  #3354

Closes #2515 Autodetect timezone in NewOrmWithDB()

dynamically add task #2708

add transport setting

Add custom fs template

add sessionid prefix

orm: support filter raw sql

security question, fix arbitrary file read