setting pacman-mirrors.conf dynamically (reverted from commit e0a94c0d)

Since travis builds are prone to fail if pacman-mirrors.conf is not found
 It has been made possible to change location by adding it to internal config
 It can then be changed on-the-fly to fit travis build (reverted from commit 9e9f32d5) (reverted from commit 625f1b3e)

Since travis builds are prone to fail if pacman-mirrors.conf is not found
 It has been made possible to change location by adding it to internal config
 It can then be changed on-the-fly to fit travis build (reverted from commit 9e9f32d5)

to be homogeneous cross files

List of changes is in changelog
Version is set to 3.3 for my test

finetuning of messages

if "dev" use dev-config

added fallback