implement ODELAY option

[goatshriek]

Stumpless currently does not support the STUMPLESS_OPTION_ODELAY option despite providing it in its header files. This option is meant to mirror the LOG_ODELAY option in functionality. The meaning will change depending on the target - each target will need to be evaluated to make sure that it conforms to this default setting.

Don't forget to document the option after you implement it in include/stumpless/option.h.

Check out the Contributing Guidelines and the development guide for the basics on working with stumpless and submitting changes.