Fix issue#60 - net-snmp command relocation erros
43fa86ce incomplete, remove uname man page as well
Fix #62 - reported by Steffen Kram
Clarify runtime dependency specification.

Refs Github issue #22

New variable RUN_DEPENDS_IPS specifies runtime dependencies, and will not be
checked for while building. Setting both DEPENDS_IPS and RUN_DEPENDS_IPS is
an error.

Preserve existing behavior when both DEPENDS_IPS and BUILD_DEPENDS_IPS are used.

Any script using only DEPENDS_IPS will now behave as if BUILD_DEPENDS_IPS is set
to the same value.
Update templates for clarity in specifying deps.

Refs Github issue #22