acu164444 - bump right_link version and update docs for release candidate 4
acu164444 Reformatted release notes a bit.

Carry forward all known limitations and remove fixed known limited.
multiple_not_supported

Added information that now we do not support multiple subnets: Only 1 network interface supported at this time.
acu164444 Update RELEASES after feedback
Merge pull request #407 from rightscale/ivory_14_08_acu164444_prepare_rc4

Ivory 14 08 acu164444 prepare rc4