Elide text to hangle stupidly long default host names mint creates.
Add install prefix argument in the build instructions.
If a file exists in $HOME/.face.icon use that as avatar.
Add enums for model roles.
Use aliases instead of binding properties.
Use property directly instead of the alias.
Update screenshot in the README.
Fix typo.
Expose last session index through session model.
Modify themes to use session model, clean up session manager.
Load font dynamically in Maldives theme.
Move combobox up 1-pixel.
Align implementation of TextBox with ComboBox.
Merge ComboBox improvements from Maui theme.
Maldives: Clean up.
Introduce SDDM components. Port all themes to the components.

Now all themes share same basic components. Components have two
different versions aligned with QtQuick versions. Depending on
the qt version compiled with, either version 1.1 or the version
2.0 of the components are installed. Themes are also configured
during installation to work with the installed version of Qt and
SDDM components.

This commit also merges elarun and maui themes which previously
residing in the sddm-themes repo. Since components are shared
we can host a couple more themes in the main repo.
Update README.md.
Add [General] category header to the config file.
Fix installation path of the components.
Update screenshots to reflect latest changes.