v0.6.1

• New #104: Save auth credentials in /root/.st2/config file for CLI (@dzimine)
• Enh #106: Move virtualhost dirs management from st2web to nginx role (@armab)
• Enh #110: Add StackStorm unstable repo to the Travis build matrix (@armab)
• Bug #105: Fix mistral register re-run on failure (@armab)
• Bug #107: Fixed failure to set permissions on the temporary files (@sidkrishna @unicell)
• Bug #109: Fix to circumvent pbr related bug in mistral-db-manage populate (@m4dcoder)