Merge pull request #702 from jay-hodgson/release-22

update httpclient to 4.2.5 in an attempt to fix NoClassDefFoundError org/apache/http/client/utils/URIBuilder on staging
swc-1046 - deleted entities cause 404 when clicking on files tab
test delete entity
remove wacky import
Merge pull request #709 from dburdick/release-22

Release 22
swc-1065 - updated Shiny site widget to be more generic, added static sagebase to whitelist
updated test
Merge pull request #710 from dburdick/swc-1065

swc-1065 - updated Shiny site widget to be more generic, added static sa...
change to static.synapse.org
Merge pull request #714 from dburdick/swc-1065

change to static.synapse.org
fix
Merge pull request #716 from dburdick/swc-1065

fix
change to https s3 url
Merge pull request #718 from dburdick/swc-1065

change to https s3 url