$ now goes not till the end of line, but one symbol before it (so e.g.
$i works as in vim now)

define per-character key-bindings in a function, instead of a loop
(where local variable "m" was bound to the last value in loop - see
line 203 in original source - so the prefix-d' and prefix-y'
key-bindings were useless)

do not raise js error when mark is not set (for prefix-d' and
prefix-y' maps)

Added a list of implemented and major not implemented key-bindings at
the top

Added commands: de, dd, P, f, t, df, dt, F, T, dF, dT, cf, ct, cF, cT,
gg, s, ce, cb, r, D, cc