Also set the USE_QT5 definition to moc
Merge pull request #106 from scarpin0/master

Also set the USE_QT5 definition to moc. Fixes #104.
Added Polish translation
Add Polish translation
Merge pull request #110 from raven700/master

Add Polish translation
Drop unused class forward declaration
Fix indent level
Rename Greeter::process to m_process

All other members are called this way.
Get rid of qobject_cast where possible.

If a class assumes parent to be of known type, state it explicitly in the
sources.
Merge pull request #112 from urkud/cleanup

Clean up.
Fixed multi-screen issue.
Merge pull request #119 from Raffarti/screen

Fixed multi-screen issue.
Added German translation.
Merge pull request #122 from eliasp/translation-de

Added German translation.
Improved the INSTALL documentation.

Fixed typos, wording, grammar and the default prefix for manual
installation which should _never_ be /usr, as this is reserved for
package manager managed files only. Manual installations should always
go to a local (~/my-builds) directory or system-wide to /usr/local.
Fixed several typos and addressed some issues.

/etc/passwd should never be read directly, but instead getpwent() should
be used to get a list of users.
The GLX requirement for QtQuick2 can be fulfilled by using the upcoming
xorg-server-1.15.0, which is now also documented.
Corrected usage of 'getent passwd' and replaced it with 'getpwent()'.
Add French translation.
Merge pull request #125 from bchretien/master

Add French translation.
Merge pull request #124 from eliasp/docs

Some updates/improvements/etc. for the documentation.