Merge pull request #350 from rightscale/ivory_14_06_acu157857_fail_with_friendly_message_if_rubygems_not_installed

acu157857 - verify if rubygems is install during RubyGems repository set...
Merge pull request #359 from rightscale/ivory_14_06_acu158158_update_rs_tag_delete_success_message

acu158158 - update success message on tag delete
Merge pull request #353 from rightscale/ivory_14_06_acu157880_fix_ssh_if_rightlink_is_not_running

acu157880 - allow user to ssh on hosted OS, even if right_link is not ru...
acu159261 - update release doc
Update RELEASES.rdoc

acu159261 - iterate on feedback.
acu159261 - Small grammar fixes
acu159261 Modify release notes items
Merge pull request #360 from rightscale/ivory_14_06_acu159261_keep_release_doc_up_to_date

Ivory 14 06 acu159261 keep release doc up to date