Add a convenience goal 'checkinstall'

The checkinstall(8) tool is a very convenient tool to install packages
from source, integrating into the current system's default package
manager.

However, it does a slightly lousy job at determining package name
and version from the directory name 'git-cheetah': it tries to use
'git' as package name and 'cheetah' as version number (which fails
on Debian, because Debian requires version numbers to start with
a digit). So help it a little by adding a goal that automatically
determines correct default values.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

nautilus/Makefile

@@ -45,6 +45,10 @@ install: all
 	mkdir -p $(LIBDIR)/nautilus/extensions-3.0
 	cp $(TARGET).so $(LIBDIR)/nautilus/extensions-3.0/
 
+checkinstall: all
+	sudo checkinstall --nodoc \
+		--pkgname=git_cheetah --pkgversion=`git describe | sed 's/^v//'`
+
 clean:
 	rm -f $(OBJECTS) $(COMPAT_OBJ) $(TARGET).so deps
 	$(MAKE) -C ../common clean