Add command to create boilerplate ini file to configure goad

[cwaltken-edrans]

To allow users to easily use the new config.ini feature of goad we should add a command that allows to create a boilerplate ini file similar to rails new.

There are a few possible ways to go:
1.) We could create a new ini file from a boilerplate if no goad.ini is present. goad init
2.) We could add a goad --save-to-settings flag that stores all parameters passed to goad together with this flag in goad.ini allowing for configuration of persistent settings on the cli.

[zeph]

we got a first iteration #129 I have to test