adopt sddm.pam from lightdms pam
allow building with qt5
fixup sddm.init
Merge pull request #49 from Nanolx/master

Debian: updated PAM + Qt5
Merge pull request #50 from Nanolx/master

Small fix in Debian init-script
Implement a more complete version of DisplayManager interface.

Interfaces extracted from lightdm through dbus introspection.
User nicer names.
Set seat path property of session.
Implement user name property of session.
Remove unused header.
Fix build with qt5.
Fix seat property.
Seat name should start with lower case 'seat'.
fix for suse
make absolutely sure that the imports path is registered, no matter what the env is
build with Qt5
constant goodness
ensure paths have trailing slashes

makes it easier to use these values elsewhere in the code as one
can now always assume they end with a /
convenience function to the current theme's full path