ido and other completion frameworks share same code

add missing variable ffip-prefer-ido-mode

restore ffip-prefer-ido-mode

can find executable on windows automatically

fixed relative path api regression

find correct relative path using buffer-file-name instead of default …

…directory

fixed regression in ffip patch

optimize speed

fixed: can't extract path at point in ffip-fix

add ffip-fix-file-path-at-point