ui freeze fix

Fixed

• ide-plugin: fix ui freeze when logging in
• server: allow editing gists
• server: allow deleting gists
• server: new token format that stores hashed tokens

Known Issues

• possible node id conflict: #9
• user name doesn't show up after login: #36
• invalid csfr token after login failed: #37

Full Changelog: v0.1.1...v0.1.2