v1.5.0

Enhancements:

• Manage default settings for VM [GH-215]
• Set --on-window-close keep-running by default [GH-182]
• Enable headless mode by default [GH-39]
• Deprecate "optimize_power_consumption" setting [GH-216]

Fixes:

• JSON parsing error while some virtual appliance is downloading [GH-204]
• Time sync doesn't synchronize timezone corectly [GH-186]
• Disable "Smart Mount" feature by default [GH-124]