Update credits and release notes
gd translation update - superfluous word deleted
Merge pull request #893 from gunchleoc/master

gd translation update - superfluous word deleted
Increment version number in CMake file
Updated the Galician (gl) translation
Merge pull request #897 from Gallaecio/gl

Updated the Galician (gl) translation
Rename "caption" key in menu configs to "label_title"

Fixes #898
Add --help and --version command line flags

Closes #899
Merge pull request #900 from dorkster/caption_fix

Rename "caption" key in menu configs to "label_title"
Display a warning when the --game flag is omitted
Reduce scope for a variable
Merge pull request #902 from hansjoachim/reduced-scope

Reduce scope for a variable
Update engine.pl.po

Eliminating last mistakes in translation
Merge pull request #904 from Pawonashi/patch-8

Update engine.pl.po
Merge pull request #901 from dorkster/cmd_line_help

Add some command line documentation
Don't show default game warning when using --help or --version
Merge pull request #905 from dorkster/fixes

Don't show default game warning when using --help or --version
Display the default game warning on the title screen

Closes #896
Merge pull request #906 from dorkster/fixes

Display the default game warning on the title screen
Handle absolute paths for BINDIR in CMakeLists.txt

Looks like this was accidently removed when splitting the CMake file
between engine and game data.