fixes #9 fail to raise IOError if default config file exists

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
fixes fail to use "rotate_limit" option on configuration file

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
fixes #8 upload or retrieve in parallel

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
support to delete multiple objects

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
update man manual

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
support pep8 less than version 1.3

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
increase version and update documents

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Merge branch 'devel'