More doc Makefile convenience edits.

vimperator/locale/en-US/Makefile

@@ -1,9 +1,18 @@
-THISLOCALE=$(notdir $(shell pwd))
+THIS_LOCALE  = $(notdir $(shell pwd))
+DOC_FILES    = $(addsuffix .html,$(basename $(wildcard *.txt)))
 
-all: *.html
+.PHONY: all doc clean distclean
+
+doc: $(DOC_FILES)
+
+clean:
+	find . -name '*~' -exec rm -f {} \;
+
+distclean: clean
+	rm -f $(DOC_FILES)
 
 %: %.html %.txt
 	@
 
-%.html: %.txt asciidoc.conf
-	@make -C ../../ locale/$(THISLOCALE)/$@
+%.html: %.txt ../../../common/Makefile.common asciidoc.conf
+	@make -C ../../ locale/$(THIS_LOCALE)/$@