change for new libev bamboo version.

Signed-off-by: Daogang Tang <daogangtang@gmail.com>
add support for root_dir.

Signed-off-by: Daogang Tang <daogangtang@gmail.com>
Merge branch 'onlibev'

Conflicts:
	config.lua
	main.lua

Signed-off-by: Daogang Tang <daogangtang@gmail.com>