There is a error message in first use of taos, because the history
file doesn't exist.

This patch tried to create an empty history file after installation,
then users won't see the error message.

| [root@045a9307c53a ~]# taos
|
| Welcome to the TDengine shell from Linux, Client Version:2.0.1.1
| Copyright (c) 2017 by TAOS Data, Inc. All rights reserved.
|
| Failed to open file /root/.taos_history
| taos>
Signed-off-by: Amos Kong <kongjianjun@gmail.com>

Update faq-ch.md

add new faq about JDBC

Master

Feature/os

Master

Fmaster/lihui

Merge from develop into master

[update version info]

TD-1205 add error code to crash_gen.py

Update faq-ch.md

Update faq-ch.md

Update cluster-ch.md

TD-1174: jdbc without host ip

fix two case of 'unexpected generic error in RPC'

Master

fix td-1189

[TD-1048]

Update cluster-ch.md

Update administrator-ch.md

Update insert-ch.md

Update Model-ch.md