Add dialyzer to makefile + minor README fixes

.gitignore

@@ -2,3 +2,4 @@
 deps/
 .eunit/
 ebin/*app
+.dialyzer_plt

Makefile

@@ -1,4 +1,5 @@
 REBAR=./rebar
+DIALYZER=dialyzer
 
 all:  deps compile
 
@@ -17,4 +18,13 @@ test:  all
 clean:
 	@$(REBAR) clean
 
+dialyze: .dialyzer_plt ~/.dialyzer_plt
+	$(DIALYZER) -I deps --plts .dialyzer_plt ~/.dialyzer_plt -- ebin
+
+~/.dialyzer_plt:
+	$(DIALYZER) --build_plt --apps erts kernel stdlib crypto mnesia sasl eunit xmerl
+
+.dialyzer_plt:
+	$(DIALYZER) --build_plt --output_plt .dialyzer_plt -r deps/*/ebin
+
 .PHONY: test deps

README.md

@@ -1,4 +1,5 @@
-XPath 1.0 interpreter for mochiweb's html tree
+[XPath 1.0](http://www.w3.org/TR/xpath/) interpreter for
+[mochiweb's html tree](https://github.com/mochi/mochiweb/blob/master/src/mochiweb_html.erl)
 See src/test.erl for examples
 
 Build