v3.0

Rewrite of Web UI in Vue.js

This release marks the first iteration of the completely new fronted web UI (thanks to @kgeorgiou). Features/Enhancements include:

• #1 rewrite and redesign of UI using vue.js
• #5 and #15 ability to start/stop individual instances in an environment
• more environment details are displayed (like total vcpu and memory counts)
• ability to filter environments by state
• version information is now displayed