Bump clj-time version to 0.8.0

Old clj-time version produces a nasty issue in case new version of the lib is used along with PigPen.
See https://github.com/clj-time/clj-time/issues/124

Some tests were failing due to the fact Clojure maps are not guaranteed to preserve kv pairs order.  Array- map are doing that. What structure behaviour to choose is up to the developer.
Declared maps {} are not preserving key-value pairs order, array-maps do
this. So this fails one one machine, but may pass on other. Sorry, did not
clarify this in first comment, had to edit.

On Fri, Sep 19, 2014 at 7:28 PM, Matt Bossenbroek <notifications@github.com>
wrote:

> In pigpen-core/src/test/clojure/pigpen/extensions/core_test.clj:
>
> > @@ -21,7 +21,7 @@
> >          pigpen.extensions.core))
> >
> >  (deftest test-pp-str
> > -  (let [data {:a "very long string" :b "another really really long string" :c [1 2 3]}]
> > +  (let [data (array-map :a "very long string" :c [1 2 3] :b "another really really long string")]
>
> Why are these changed?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/Netflix/PigPen/pull/76/files#r17794486>.
>