Fixed capitalization on config options.

Author: frederickjh

examples/docker-gen.cfg

@@ -10,8 +10,8 @@ dest = "/etc/logrotate.d/docker"
 watch = true
 
 [[config]]
-Template = "/etc/docker-gen/templates/nginx.tmpl"
-Dest = "/etc/nginx/conf.d/default.conf"
+template = "/etc/docker-gen/templates/nginx.tmpl"
+dest = "/etc/nginx/conf.d/default.conf"
 watch = true
 [config.NotifyContainers]
 nginx = 1  # 1 is a signal number to be sent; here SIGINT