Use SQL timestamp instead of time

* Use SQL data type timestamp for users.created and
  repositories.updated since we want to store datetimes, not time of
  day
* Fix :migration-dir in project file

Fixes: #15

project.clj

@@ -48,7 +48,7 @@
   :target-path "target/%s/"
   :main commiteth.core
   :migratus {:store :database
-             :migration-dir "resources/migrations"
+             :migration-dir "migrations"
              :db ~(get (System/getenv) "DATABASE_URL")}
 
   :plugins [[lein-cprop "1.0.1"]

resources/migrations/20170121175409-fix-timestamp-column-datatypes.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE public.users ALTER COLUMN created SET DATA TYPE timestamp without time zone using date('20170120') + created;
+ALTER TABLE public.repositories ALTER COLUMN updated SET DATA TYPE timestamp without time zone using date('20170120') + updated;