Multiples fixes:
* [volume: Use '/usr/bin/env bash' as shebang](cd182fd4f2 (diff-210ab9e731c9c36c2c38db15c28a8d1c))
On some systems (e.g. NixOS, openBSD) Bash isn't located or symlinked at
`/bin/bash`. This change ensures that the correct path is used across
different operating systems.
* [volume: add LABEL support](be3f4ae715 (diff-210ab9e731c9c36c2c38db15c28a8d1c))
* [volume: use injected properties](50b2b6ee53 (diff-210ab9e731c9c36c2c38db15c28a8d1c))
See #132
* [volume: pulse-detection: explicitly try the "pulse" device](777a056cce (diff-210ab9e731c9c36c2c38db15c28a8d1c))
Because it's available on some systems (for which pulse is the right
option), but not the default, so `amixer info` will not give the right
result. When this command succeeds, there is no more need to check the
output.
Additionally removed a wrong test bracket (not neccessary and not
working for all bash versions).
* [volume: don't check for pulse via lsmod but command](67dba4fca9 (diff-210ab9e731c9c36c2c38db15c28a8d1c))
- check if command `pulseaudio` exists
- check if pulse is running
- in the case that pulse is detected, still check if the mixer name
"pulse" exists
- instruction for manual setting in README
Fixes vivien/i3blocks#236
Fixes vivien/i3blocks#201
Fixes: vivien/i3blocks#281
* [volume: allow device names to include numbers](1b3efc6e44 (diff-210ab9e731c9c36c2c38db15c28a8d1c)):
Fixes: vivien/i3blocks#281
Jesús
c6a2d62411