Merge pull request #11 from bergmark/master

Add mtl instances for ModuleT
Wrap the extension list
Fix warnings and add -Wall
Travis
Put lower v.bound on mtl
Release 0.2.2
Update README
Add CHANGELOG to the distribution
Relax Cabal dependency constraint to include 1.14
Release 0.2.3
optparse-applicative 0.6

Fixes #12
Add help to subcommands

Fixes #5
Release v0.2.3.1
Update installation instructions
Allow aeson 0.7