Help prints options

Print the overview of the options available like this (in cli)

```
[Magneto CLI]$ magneto help
The commands available to you are:
Plugin "Magneto politeness":
	\b([Hh]ello|[Hh]i).*
	\b([tT]hanks|ty|TY|[tT]hank you).*

[Magneto CLI]$ 
```

Succeeds #7