Support for comments in profile file, cleaned readme and help

Adds support for the following comments in the profile file (because, why not)

```
// comment (C style)
-- comment (SQL style)
; comment (INI style)
# comment (bash style)
```

I've also slightly improved the look of readme and help, but feel free to discard those changes.
The comments are what matter - I want to annotate my profile when editing it.

Thx