generic completion mechanism for Emacs

 Ivy is an acronym for Incremental Vertical completYon. While it
 operates similarly to other completion schemes, such as
 Icomplete mode, Ivy aims to be more efficient, smaller, simpler, and
 smoother to use--yet highly customisable.
 .
 To try Ivy, call M-x ivy-mode. A default installation of Ivy only
 includes the generic completion framework, plus completion for file
 and buffer names.
 .
 This package will not install all of Ivy/Swiper/Counsel. For a
 full-featured experience please install "elpa-counsel", which will
 also install "elpa-swiper". Hydra users will probably also want
 "elpa-ivy-hydra".
 .
 Counsel is an alternative to Ido, Anything, and Helm.