Merge pull request #21 from cochise/master

Adds support to login with press of enter key (at keypad)
Update contributors document.
Update mailing-list address.
Rename namespace and header guards, SDE -> SDDM.
Add irc channels to the README.
Drop warnings
Add travis config file.
Merge pull request #23 from ascarpino/master

Drop warnings.
Install the sample config in the data dir
Install cmake from ppa, since we need cmake 2.8.8
Update CONTRIBUTORS.
Merge pull request #24 from ascarpino/master

Install the sample config in the datadir.
add maximumUid support
Those aren't functions, but properties
Merge pull request #27 from ascarpino/master

Fix suspend/hibernate buttons in the Elarun theme
Merge pull request #26 from a17r/master

add maximumUid support. Fixes #25.
Update CONTRIBUTORS.
Port to XCB.
Log error when chdir fails.
Fix warning