Small fixes

* update translations, add target to update translations
* add custom keys support to config helper

sources/translations/extract_messages.sh

@@ -1,27 +1,31 @@
 #!/bin/bash
-# root of translatable sources
-BASEDIR="../"
+
+# properties
 PROJECT="awesome-widgets"
 BUGADDR="https://github.com/arcan1s/awesome-widgets/issues"
-WORKDIR=$(pwd)
+
+# root of translatable sources
+SCRIPTDIR="$(dirname -- $(readlink -f -- $0))"
+BASEDIR="${SCRIPTDIR}/../"
+WORKDIR="$(pwd)"
+
 # translations tags
+# dunno what does this magic do actually
 TAGS="-ci18n -ki18n:1 -ki18nc:1c,2 -ki18np:1,2 -ki18ncp:1c,2,3 -ktr2i18n:1 -kI18N_NOOP:1 \
 -kI18N_NOOP2:1c,2 -kaliasLocale -kki18n:1 -kki18nc:1c,2 -kki18np:1,2 -kki18ncp:1c,2,3"
 
-find "${BASEDIR}" -name '*.rc' -o -name '*.ui' -o -name '*.kcfg' | sort > "${WORKDIR}/rcfiles.list"
-xargs --arg-file="${WORKDIR}/rcfiles.list" > "${WORKDIR}/rc.cpp"
-echo 'i18nc("NAME OF TRANSLATORS","Your names");' >> "${WORKDIR}/rc.cpp"
-echo 'i18nc("EMAIL OF TRANSLATORS","Your emails");' >> "${WORKDIR}/rc.cpp"
-
-find "${BASEDIR}" -name '*.cpp' -o -name '*.h' -o -name '*.qml' | sort > "${WORKDIR}/infiles.list"
-echo "rc.cpp" >> "${WORKDIR}/infiles.list"
+find "${BASEDIR}" \
+    -name '*.cpp' -o -name '*.h' -o -name '*.qml' -o -name '*.ui' -o -name '*.rc' | \
+    sort > "${WORKDIR}/infiles.list"
 
 xgettext -C --no-location --msgid-bugs-address="${BUGADDR}" ${TAGS} \
---files-from="infiles.list" -D "${BASEDIR}" -D "${WORKDIR}" -o "${PROJECT}.pot" || exit 1
+    --files-from="${WORKDIR}/infiles.list" -D "${BASEDIR}" -D "${WORKDIR}" \
+    -o "${PROJECT}.pot" || exit 1
 
-TRANSLATIONS=$(find . -name '*.po')
+TRANSLATIONS=$(find "${BASEDIR}" -name '*.po')
 for TR in ${TRANSLATIONS}; do
-    msgmerge -U -q --backup=off "${TR}" "${PROJECT}.pot"
+    msgmerge -U -q --backup=off "${TR}" "${WORKDIR}/${PROJECT}.pot"
+    msgattrib --no-obsolete -o "${TR}" "${TR}"
 done
 
-rm -f "rcfiles.list" "infiles.list" "rc.cpp"
+rm -f "${WORKDIR}/infiles.list"