Added pacaur aliases

This commit removes most of its contents: it just leaves the
contribution signature. The rest is obsolete and superseeded
by #5460, but the contribution is still valuable.

Related: #4263.
Signed-off-by: Marc Cornellà <marc.cornella@live.com>

plugins/archlinux/README.md

@@ -67,3 +67,4 @@
 - Martin Putniorz - mputniorz@gmail.com
 - MatthR3D - matthr3d@gmail.com
 - ornicar - thibault.duplessis@gmail.com
+- Juraj Fiala - doctorjellyface@riseup.net