PEP8 whitespace changes, remove unused imports
readline -> libedit
Update travis for libedit
Update README for libedit
Merge pull request #128 from flsafe/pep-8-code-py

PEP8 whitespace changes, remove unused imports
Merge pull request #130 from johnwalker/libedit

Replace readline with libedit
deprecate the shell build scripts

they print out a message with the appropriate `make ...` command to use
instead.
update 'make help' to mention new targets
remove references to build scripts from the README
build with python on travis
Merge pull request #131 from heyLu/deprecate-build-scripts

Deprecate build scripts
fix the docker build

e.g. use libedit there as well
switch to polymorphic c types in ffi
finish switching over to CTypes style