Merge pull request #48 from lazy-night/dev/ui

[WIP] DevIPL
Modify README.md
Bug fixed for set image tag
Merge pull request #51 from lazy-night/dev/api

Dev/api
Add test code for non sshkey and port
Merge pull request #55 from lazy-night/dev/api

Add test code for non sshkey and port
Add api/workspace
Bug fixed for no setting port with creating container
Modify web/__init__.py for delete debug code
Merge pull request #56 from lazy-night/dev/api

Dev/api
for DevIPL.
Merge branch 'master' into dev/ui