v0.3.3

Disable autosuggest if buffer is too large

Make buffer max size configurable, defaulted to infinity

According to a few tests, the `fc` builtin appears to be quite a bit
faster than searching through the `$history` associative array when
dealing with large history files (500K+).

Document caveats of match_prev_cmd strategy

This strategy relies on the history being exactly in the order in which
commands have been entered.  Therefore, options like suppressing
duplicates or expiring duplicates first will lead to unexpected
suggestions.

v0.3.2

Adjust plugin.zsh file to run on zsh 5.1 in mSYS2.

See PR #149

See issue #152

Solves problems when dealing with widget names with irregular
characters such as those that come from `opp.zsh`.

Keep track of return value from original widget (#135)