Be a bit nicer to users.
Revert Value from GADT to ADT.
Create Database type.
Merge pull request #1 from ZerglingRush/master

Rename fromString to parseCommand
Merge branch 'state' of github.com:chrisdotcode/aclick
Replace Error value constructor with Nil.
Allow integers to be inserted as strings.
Merge pull request #2 from chrisdotcode/master

Lots of changes to be merged