Add text-format haskell library
haskellPackages.linear: Update to 1.3.1
haskell-hslua: remove support for linking the system's lua library

This feature is broken: <https://github.com/osa1/hslua/issues/8>.
Merge pull request #1114 from ocharles/linear

haskellPackages.linear: Update to 1.3.1
Merge pull request #1110 from errge/master

Add text-format haskell library