Fix/enhance makefile rules after the rename

Makefile

 HPROGS = hbal hn1
-HSRCS := $(filter-out $(HPROGS), $(wildcard src/*.hs))
+HSRCS := $(wildcard Ganeti/HTools/*.hs)
 HDDIR = apidoc
 
+DOCS = README.html NEWS.html
+
 # Haskell rules
 
-all: hbal hn1
+all: $(HPROGS)
 
 hn1 hbal: Ganeti/HTools/Version.hs
 	ghc --make -O2 -W $@
 
-README.html: README
+$(DOCS) : %.html : %
 	rst2html $< $@
 
-doc: README.html
+doc: $(DOCS)
 	rm -rf $(HDDIR)
-	mkdir -p $(HDDIR)/src
-	cp hscolour.css $(HDDIR)/src
+	mkdir -p $(HDDIR)/Ganeti/HTools
+	cp hscolour.css $(HDDIR)/Ganeti/HTools
 	for file in $(HSRCS); do \
 		HsColour -css -anchor \
-		$$file > $(HDDIR)/src/`basename $$file .hs`.html ; \
+		$$file > $(HDDIR)/Ganeti/HTools/`basename $$file .hs`.html ; \
 	done
 	haddock --odir $(HDDIR) --html --ignore-all-exports \
 		-t htools -p haddock-prologue \
-		--source-module="src/%{MODULE/.//}.html" \
-		--source-entity="src/%{MODULE/.//}.html#%{NAME}" \
+		--source-module="Ganeti/HTools/%{MODULE/.//}.html" \
+		--source-entity="Ganeti/HTools/%{MODULE/.//}.html#%{NAME}" \
 		$(HSRCS)
 
 clean:
-	rm -f *.o hn1 zn1 *.prof *.ps *.stat *.aux \
-	    gmon.out *.hi README.html TAGS Ganeti/HTools/Version.hs
-	git describe >/dev/null && rm -f version
+	rm -f hbal hn1
+	rm -f *.o *.prof *.ps *.stat *.aux *.hi
+	cd Ganeti/HTools && rm -f *.o *.prof *.ps *.stat *.aux *.hi
+	rm -f $(DOCS) TAGS Ganeti/HTools/Version.hs
+	git describe >/dev/null 2>&1 && rm -f version || true
 
 version:
 	git describe > $@
 
 Ganeti/HTools/Version.hs: Ganeti/HTools/Version.hs.in version
-	sed -e "s/%ver%/$$(cat ../version)/" < $< > $@
+	sed -e "s/%ver%/$$(cat version)/" < $< > $@
 
-dist: version
+dist: version doc
 	VN=$$(cat version|sed 's/^v//') ; \
 	ANAME="htools-$$VN.tar" ; \
 	rm -f $$ANAME $$ANAME.gz ; \
@@ -47,4 +51,4 @@ dist: version
 	gzip -v9 $$ANAME ; \
 	tar tzvf $$ANAME.gz
 
-.PHONY : all doc clean hn1 dist
+.PHONY : all doc clean dist