Bump yi-rope for better detection and 7.6.3
Add width record to Window.

Allows for anything with EditorM context to get the number of characters
available in a single line. Needed for operations like "gj" and "gk", I
think.
Force vty 5.2.4 which should fix 32-bit builds
Fix vim keymap for f<.

< comes in escaped as "<lt>", so it wasn't correctly pattern matching
for a single character.

Also adds test for this case.
Allow zero motion in normal operator pending mode. Fixes #657.
I've accitentally a type signature.
Add cabal test to travis
Fix d0.
Fix travis file.
Don't jump out of text bounds with moveTo
Reposition cursor after deleteTrailingSpaceB

Fixes #666
Fix vim write-as (:w ex command).

Parser had two major flaws:
(1) It was using a nonbacktracking choice, both of which had the same
parser at the start. Factor this out.
(2) It was doing them in the wrong order, due to a "many" instead of
"many1" in the first parser unconditionally succeeding. So I just
switched the order we try them, since the :w <file> demands a space.