Add dialyzer and compiler options to rebar.config.

rebar.config

@@ -1,4 +1,15 @@
-%%-*- mode: erlang -*-
 {deps, [
 	{ex_reloader, ".*", {git, "git://github.com/extend/ex_reloader.git", "HEAD"}}
 ]}.
+{dialyzer_opts, [src, {warnings, [
+	behaviours,
+	error_handling,
+	race_conditions,
+	unmatched_returns
+%%	underspecs
+]}]}.
+{erl_opts, [
+%%	bin_opt_info,
+%%	warnings_as_errors,
+	warn_export_all
+]}.