boot2docker 0.9.1

Closes #29352.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
rebar 2.3.0

Closes #29353.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
only clean logs if logs exist

Closes #29355.
mecab-ko-dic 1.6.0-20140515
rebar: add 2.3.0 bottle.
mecab-ko-dic: add 1.6.0-20140515 bottle.
boot2docker: add 0.9.1 bottle.