cabal install alex
Well, I was updating it and the compilation breaks with 3.0.2
Strictly speaking Alex is only required for development, if the lexer changes, since the output of Alex is included in the distributed source.
Perhaps I should remove the constraint and note it for development?
Ah that sounds annoying. I think 3.0.1 doesn't build with GHC 7.6, so that would require users with only that version to install another GHC. Removing it from the requirements would certainly make it easier for those people.
Remove constraint on Alex 3.0.1, it is only required to make changes …
…to the lexer. Closes #19