update count after typing f
unnecessary autocmd
do not move cursor on input spuriously
ignore special characters
improve(?) English
Merge pull request #4 from rhysd/update/English

Improve English.
Merge pull request #3 from rhysd/improve/deal_special_chars

Ignore special characters
change default key
Merge branch 'dev'
Merge pull request #2 from rhysd/improve/do_not_move_cursor

Do not move cursor on input spuriously
Merge branch 'dev'