Update use of Halcyon

.halcyon/constraints

@@ -0,0 +1,85 @@
+aeson-0.8.0.2
+ansi-terminal-0.6.2.1
+array-0.5.0.0
+attoparsec-0.12.1.2
+auto-update-0.1.2
+base64-bytestring-1.0.0.1
+base-4.7.0.1
+binary-0.7.1.0
+blaze-builder-0.3.3.4
+blaze-html-0.6.1.3
+blaze-markup-0.5.2.1
+byteorder-1.0.4
+bytestring-0.10.4.0
+case-insensitive-1.2.0.1
+cmdtheline-0.2.3
+containers-0.5.5.1
+data-default-0.5.3
+data-default-class-0.0.1
+data-default-instances-base-0.0.1
+data-default-instances-containers-0.0.1
+data-default-instances-dlist-0.0.1
+data-default-instances-old-locale-0.0.1
+deepseq-1.3.0.2
+directory-1.2.1.0
+dlist-0.7.1
+easy-file-0.2.0
+exceptions-0.6.1
+fast-logger-2.2.3
+filepath-1.3.0.2
+file-embed-0.0.7
+ghc-prim-0.3.1.0
+hashable-1.2.3.0
+haskeline-0.7.1.2
+http-date-0.0.4
+http-types-0.8.5
+integer-gmp-0.5.1.0
+lifted-base-0.2.3.1
+mmorph-1.0.4
+monad-control-0.3.3.0
+monad-unify-0.2.2
+mtl-2.1.3.1
+nats-1
+network-2.6.0.2
+old-locale-1.0.0.6
+old-time-1.1.0.2
+parsec-3.1.7
+pattern-arrows-0.0.2
+pretty-1.1.1.1
+primitive-0.5.4.0
+process-1.2.0.0
+purescript-0.5.7.1
+random-1.1
+regex-base-0.93.2
+regex-compat-0.95.1
+regex-posix-0.95.2
+resourcet-1.1.3.1
+rts-1.0
+scientific-0.3.3.3
+scotty-0.9.0
+semigroups-0.16
+simple-sendfile-0.2.18
+stm-2.4.3
+streaming-commons-0.1.7.2
+stringsearch-0.3.6.5
+syb-0.4.2
+template-haskell-2.9.0.0
+terminfo-0.4.0.0
+text-1.1.1.3
+time-1.4.2
+transformers-0.3.0.0
+transformers-base-0.4.3
+unix-2.7.0.1
+unix-compat-0.4.1.3
+unix-time-0.3.4
+unordered-containers-0.2.5.1
+utf8-string-0.3.8
+vault-0.3.0.3
+vector-0.10.12.2
+void-0.7
+wai-3.0.2
+wai-extra-3.0.2.2
+wai-logger-2.2.3
+warp-3.0.4
+word8-0.1.1
+zlib-0.5.4.2