Add makefile target for spell checking (#81)

* Add makefile target for spell checking

* Separate out spell into two separate commands

* Update Makefile.in

Makefile.in

@@ -157,6 +157,30 @@ vers_update:
 		chmod +x $$f; \
 	done
 
+DOC_FILES = CHANGELOG.txt README.asciidoc BUGS.txt INSTALL.txt doc/a2x.1.txt \
+	 		doc/faq.txt doc/asciidocapi.txt doc/testasciidoc.txt \
+			doc/epub-notes.txt doc/publishing-ebooks-with-asciidoc.txt \
+			doc/source-highlight-filter.txt doc/slidy.txt doc/slidy-example.txt
+
+WEBSITE_FILES = examples/website/index.txt examples/website/README-website.txt examples/website/support.txt
+
+.PHONY: ${DOC_FILES}
+${DOC_FILES}:
+	aspell check -p ./doc/asciidoc.dict $@
+
+.PHONY: ${WEBSITE_FILES}
+${WEBSITE_FILES}:
+	aspell check -p ./examples/website/asciidoc-website.dict $@
+
+.PHONY: spell_doc
+doc_spell: ${DOC_FILES}
+
+.PHONY: spell_website
+website_spell: ${WEBSITE_FILES}
+
+.PHONY: spell
+spell: doc_spell website_spell
+
 build: fixconfpath $(manp)
 
 install: all $(PROGTARGETS) $(DATATARGETS) progsymlink