fixes requirements in README

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
set default timeout as 5.0

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

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