* Restructure entire course into a single library with multiple executable definitions. Makes working through the course a bit easier with respect to sandboxes, nix shells, and stack caching. Should be a side benefit of giving editor tooling a bit of an easier time. Lowers switch time between course levels.
* Readme updates to suit new structure.
Add comment to cabal file.
* Syntax error in Travis yml file.
Not sure where yet.
* Applied some linting suggestions to travis file
* Fixed missing comments in travis yml, removed duplicate executable entry in the cabal file
* Added changelog file, vcs entry to cabal file
* Fixing travis file, WIP.
* Still trying
* Added cabal.project file
* Still trying (Travis)
* Moved var declaration to higher level in travis.yml file.
* Forgo the complexity of hvrs script and go low-tech.
* Remove Haddocks from stack build.
Add extra-deps because what was a working stack build is now failing for some
reason, despite having the same version bounds and using the same LTS as before.
* Added more deps to extra-deps to appease the stackbeast.
* Updated base README
* Readme tweaks, level 03 test updates
* Moved Level07 to Level05, bumped other levels accordingly.
* Moved 'Main' to 'Core'.
Updated READMEs, first pass.
Updated Cabal file.
Updated Tests to handle change of Main to Core.
* Proof read #3616
Lots of small fixes for file paths, wording, some additional exercises. Fixed up
the tests to be more consistent as they've been reordered a few times and mostly
left to rot.
Readmes updated where needed.
New exercise added to level07 for using the general `ExceptT` type.
* Fix up some tests and avoid any more dynamic linking errors, I think
* Fix up cabal config for doctests, missing packages and some exposed-modules
* Removed use of Semigroup in tests to avoid CPP in cabal file for including semigroups package. Added bounds to base dependency for doctests test-suite
