Added sr (select related) parameter in get_user function definition, with 'dc_bound' as default.
Added sr (select related) parameter in get_user function definition,
with 'dc_bound' as default.

Closes #18.

erigones/esdc-ce,erigones/esdc-ce,erigones/esdc-ce,erigones/esdc-ce,erigones/esdc-ce,erigones/esdc-ce,erigones/esdc-ce