Move mal code examples from mal/ to examples/

diff --git a/mal/clojurewest2014.mal b/examples/clojurewest2014.mal
similarity index 100%
rename from mal/clojurewest2014.mal
rename to examples/clojurewest2014.mal

diff --git a/mal/hello.mal b/examples/hello.mal
similarity index 100%
rename from mal/hello.mal
rename to examples/hello.mal

diff --git a/mal/presentation.mal b/examples/presentation.mal
similarity index 100%
rename from mal/presentation.mal
rename to examples/presentation.mal