에디터가 중복 열리지 않도록 수
fixed schedule many bugs and enhancement
done. 
https://github.com/hangum/TadpoleForDBTools/issues/325
enhancement OTP
update java version 1.6 to 1.7.
update JDBC Driver.
cubrid, mongodb,mssql,mysql
update java version 1.6 to 1.7
remove unuse plugin
update version release date.
- update user table.
otp_secret column default value ''
(ALTER TABLE user ADD otp_secret VARCHAR(50) NULL DEFAULT '';)

- readme update
update site
Merge pull request #454 from hangum/1.3.7

1.3.7