refactor move logic to separate function buf-move-to
add buf-move-swap-buffers customization flag to "move" instead of "swap" buffers
bump version to 0.6
rename buf-move-swap-buffers to buffer-move-behavior and allow the values 'swap and 'move
Manually merge branch 'move-swap' of https://github.com/hupf/buffer-move into hupf-move-swap
Merge branch 'hupf-move-swap'