Update disnix related sources that were referencing dead hydra tarball builds
haskell-monadloc: add version 0.7.1
haskell-cake3: add version 0.3.0.1
Merge pull request #2078 from chrisfarms/disnix/hydrasourceurls

Fix disnix related sources that were referencing dead hydra tarball
Revert "haskell-smtps-gmail: update to version 1.1.0"

The smtps-gmail upgrade causes a build failure:

/nix/store/8h8mravvbcm09rhybxq7hi4459lkssg8-stdenv/setup: line 937: ./Setup: No such file or directory

This reverts commit a7c80c11e5cfee6fc847fa7b228e11b4a0188060.
haskell-mime-mail: Update, set sendmail to be found in PATH

See snoyberg/mime-mail#23
import thumbor and dependencies:

derpconf, backports_ssl_match_hostname_3_4_0_2, thumborPexif,
upgrade tornado to 3.2 (that contains security fixes)
remove the unbreak-syntax-highlight hack
haskell-hamlet: this package doesn't export any modules to document