Get rid of Yi.Region import
Give the boot to lexers + Prototype
Merge branch 'master' into lexer-move
dep on fixed yi-language
Make GHCi process name a variable.
Small cleanup
Statically enforce Editor invariant + cleanup
Expose the GhciProcessName var to the user
Hopefully fix vim tests
Allow the user to set GHCi args too.
Catch failure when subprocess fails + clean up