Macros for Vim keymap.
Vim macros are stored in yank registers.
Merge pull request #559 from ethercrow/maintenance

Fix some warnings, update travis script.
Merge pull request #561 from ethercrow/vim-macros

Macros for Vim keymap.
Remove ghcapi flag.
Remove scion flag.
Drop upper bound for Cabal library.
Simpify writeB and replaceCharB.
Bump diff lower bound.