Merge pull request #354 from rightscale/ivory_14_06_acu158145_fix_empty_tag_adding

acu158145 - display an error if empty value provided on adding a tag
Merge pull request #356 from rightscale/ivory14_16_acu157666_fix_strand_on_repose_with_empty_boot_bundle

Do not run boot bundle if it is empty
Merge pull request #361 from rightscale/ivory_14_06_acu159261_keep_release_doc_up_to_date

acu159261 - update release doc
acu161081 - fix executable_sequence_proxy spec
Merge pull request #364 from rightscale/ivory_14_07_acu161081_fix_broken_specs

Ivory 14 07 acu161081 fix broken specs