Update build system

.gitattributes

.kateproject.build.in

CMakeLists.txt

Makefile

mkzip

package/README_TRANSLATIONS.md

package/contents/ui/LunaIcon.qml

package/contents/ui/shadow.qsb

package/po/Messages.sh

package/po/es/plasma_applet_org.kde.userbase.plasma.luna3.po

package/po/fr/plasma_applet_org.kde.userbase.plasma.luna3.po

package/po/hr/plasma_applet_org.kde.userbase.plasma.luna3.po

package/po/nl/plasma_applet_org.kde.userbase.plasma.luna3.po

package/po/plasma_applet_org.kde.userbase.plasma.luna3.pot

package/po/ru/plasma_applet_org.kde.userbase.plasma.luna3.po

src/CMakeLists.txt