Added automatic linguist release (i18n update) to make process

* Doesn't require the user to invoke lrelease manually
* However, qmake needs to be run once with "-nodepend"

pulsatingscience.pro

@@ -31,8 +31,26 @@ SOURCES += src/pulsaranimationwidget.cpp \
     src/main.cpp
 FORMS += src/pulsatingscience.ui
 RESOURCES += src/pulsatingscience.qrc
+TS_DIR = src/resources
 TRANSLATIONS = src/resources/pulsatingscience_de.ts
 UI_DIR = src/.ui
 RCC_DIR  = src/.rcc
 MOC_DIR = src/.moc
-OBJECTS_DIR = src/.obj
\ No newline at end of file
+OBJECTS_DIR = src/.obj
+
+!isEmpty(TRANSLATIONS) {
+	isEmpty(QMAKE_LRELEASE) {
+		win32:QMAKE_LRELEASE = $$[QT_INSTALL_BINS]\lrelease.exe
+		else:QMAKE_LRELEASE = $$[QT_INSTALL_BINS]/lrelease
+	}
+
+	isEmpty(TS_DIR):TS_DIR = translations
+
+	linguist.name = lrelease ${QMAKE_FILE_IN}
+	linguist.input = TRANSLATIONS
+	linguist.output = $$TS_DIR/${QMAKE_FILE_BASE}.qm
+	linguist.commands = $$QMAKE_LRELEASE ${QMAKE_FILE_IN}
+	linguist.CONFIG = no_link
+	QMAKE_EXTRA_COMPILERS += linguist
+	PRE_TARGETDEPS += compiler_linguist_make_all
+}