Fix crash bug of envgen when getting 404 (kyuridenamida#201)

Release/1.1.7 (kyuridenamida#200)

* Update CHANGELOG.md

* Update version

* Fix decimal judge

* Style fix

* Fix submission page bug

Release/1.1.6 (kyuridenamida#162)

* prepare for release 1.1.6

* show error_type instead of judge_type on test command

Release 1.1.5 (kyuridenamida#152)

* Get ready for 1.1.5

* Refactor & Update README.md

* Update contributors table

* Fix webapp

Release 1.1.4 (kyuridenamida#139)

Release 1.1.3 (kyuridenamida#125)

* Update version

* Update change log

Release 1.1.2 (kyuridenamida#112)

Release/1.1.1 (kyuridenamida#94)

* Update change log

* Update version

* Fix bug around version notification

* Update README

Release/1.1.0 (kyuridenamida#81)

* Update version to 1.1.0

* Update README

* Update CHANGELOG.md

* fix a bug of Java template (no issue)

Release/1.0.6.1 (kyuridenamida#77)

* Update changelog.md

* update version