Do not use default with getbufvar for old Vim
Add infrastructure for tests, via tmux to get real VimEnter etc
Use tmux only, no 'vim --servername', which fails on Travis and is more complex
Merge branch 'add-tests'
Add travis build status to README
Improve debug logging
tests: improve timeout behaviour
Add 'manual' target
doc
Handle empty diminactive_orig_cuc & remove experimental storing