Cleanup and refactor of public plugin API

Improve upon API names, both internal and external, to make it clearer
where methods are located and clarify responsibility.

Add new Makefile target "dev" to create untagged development snapshots.

Bump version for upcoming release.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile

@@ -29,9 +29,10 @@
 ROOTDIR    ?= $(shell pwd)
 
 #VERSION    ?= $(shell git tag -l | tail -1)
-VERSION    ?= 1.3
+VERSION    ?= 1.4
 EXEC        = finit
 PKG         = $(EXEC)-$(VERSION)
+DEV         = $(EXEC)-dev
 ARCHIVE     = $(PKG).tar.xz
 HEADERS     = plugin.h svc.h helpers.h
 DISTFILES   = LICENSE README ChangeLog finit.conf services
@@ -139,6 +140,15 @@ dist:
 	git archive --format=tar --prefix=$(PKG)/ $(VERSION) | xz >../$(ARCHIVE)
 	@(cd ..; md5sum $(ARCHIVE) | tee $(ARCHIVE).md5)
 
+dev: distclean
+	@echo "Building unstable xz $(DEV) in parent dir..."
+	-@$(RM) -f ../$(DEV).tar.xz*
+	@(dir=`mktemp -d`; mkdir $$dir/$(DEV); cp -a . $$dir/$(DEV); \
+	  cd $$dir; tar --exclude=.git --exclude=contrib             \
+                        -c -J -f $(DEV).tar.xz $(DEV);               \
+	  cd - >/dev/null; mv $$dir/$(DEV).tar.xz ../; cd ..;        \
+	  rm -rf $$dir; md5sum $(DEV).tar.xz | tee $(DEV).tar.xz.md5)
+
 # Include automatically generated rules, such as:
 # uncgi.o: .../some/dir/uncgi.c /usr/include/stdio.h
 # but don't bother during clean!