Handle env variables with space

Hi there,

I was trying to set a env variable with `octo config:set VARIABLE "somename with space"` and I noticed it was dropping the content after the space, due to bash word splitting on the arguments of set.

To test I used

```bash
octo config:set repo/A_VAR "with spaces"
octo config:get repo/A_VAR
octo config:env

octo start repo
octo restart repo
```
Using the for to set each `conf` would split the values by whitespace, instead of new lines.
Using `read conf` will set conf for the whole line se we can process it.