Changed the wording of some sections. Added more info to some of the
exercise README files.
Added some more structure to the tests exercise to make it a little
less open. Still undefined sections but there is a bit more guidance
about what things might look like.
Preparation for the name change to 'Applied' instead of 'Advanced'
Added readme files to the individual exercises to help point people in the right
direction when they get started. Probably more useful to the people that are
wanting to try this by themselves.
Added level05: installing a DB layer.
Updated the cabal files with a nice ghc-option of '-Wall -Werror'.
Added some more comments to the level04 testing page.
Level 04 contains some testing fun.
Removed spurious yaml file from level03.
Update README.
Have noticed irritating snafu RE the app structure. Not built as a
library in other levels, will fix.
Level 03 updated with a bit more information, removed yaml-config due to other
issues. Added the configuration to the main and updated the relevant bits.
Not written up with comments or even very clean at the moment.
Trying to decide between exceptions and YAML or no exceptions but
manual parsing for JSON config file.
Or something else entirely...
