Merge branch 'master' of https://github.com/j6t/gitk

* 'master' of https://github.com/j6t/gitk: gitk: l10n: make PO headers identify the Gitk project gitk: ignore generated POT file gitk: i18n: use "Gitk" as package name in POT file gitk: commit translation files without file information gitk: support link color in the Preferences dialog gitk: use config settings for head/tag colors