Split from #46.

• remove -t/--template and the hierarchy layer between templates and config.yaml
• add switch to chose which config file to use, default config.yaml
• add interactive auto-upgrade routine if no config.yaml but a i3 template dir is found

This project seems sufficiently popular and complex to warrant a man page.

I've drafted out a sample page from the contents of your wiki, feel free to chop it up or modify it in any way.

.TH "WAL-DISCORD" "1" "April 2019" "" "wal-discord manual"
.
.SH NAME
\fBwal-discord\fR \- generate CSS files for \fBdiscord\fR based on \fBpywal\fR themes\.
.
.SH SYNOPSIS
.P
A \fBbash\fR

Currently, without taking proper precautions, succade might keep on running even if the X Server is being shut down. We should research if there is a way to detect when X (or alternatively succade's parent process) is gone. If that's not reliably possible, we should document this somehow (for example, add an example that shows how to modify the sxhkd hotkeys to also shut down succade properly.