Version 0.5.0

• support different caching duration for different mime types
• add consul catalog provider
• add "d" (days) units to cache's duration parsing
• add support of docker route prefix
• support of html error reporting with custom templates
• detect in-container and set listen address to 0.0.0.0
• set X-Forwarded-Host to original host, drop X-Origin-Host
• treat 0 max request size limit as unlimited
• fix default docker dest to include container
• wait till fqdn avail for ssl auto
• extend health check to make sure all pings called