Update packager

Filetype changed to .plasmoid because that's what the file loader is
looking for.
Take the version number directly from the metadata.

.gitignore

 *.zip
+*.plasmoid
 /build/
 /*.kdev4
 *~

mkzip

 #!/bin/bash
 
+METADATA="package/metadata.desktop"
+VERSION=$(grep "X-KDE-PluginInfo-Version" $METADATA | sed 's/.*=//')
+
 cd package
-zip -r ../Luna-II-ver.zip *
+zip -r ../Luna-II-${VERSION}.plasmoid *
 cd ..