* Only build packages that are actually present in source tree.
This should fix detection of renamed package folders, including case
sensitivity changes.
* Fix case sensitivity of Bintray account names.
Bintray accounts are now properly referenced in lowercase, and compared
without case sensitivity against the GitHub account for enabling deployment.
* Initialize target list when converting lines to array.
A pacman repository is now generated with built packages, and exported by
AppVeyor to Bintray. Similar export can now be implemented for Drone, and
services other than Bintray can also be used.
