Merge pull request #284 from jay-hodgson/release-1.24

SWC-536
Merge pull request #286 from dburdick/swc-521

reworked created by and modified by, as well as metadata display
SWC-547: refresh entity after edit
Merge pull request #289 from jay-hodgson/release-1.24

SWC-547: refresh entity after edit
SWC-550: improved fenced code block detection
Merge pull request #290 from jay-hodgson/SWC-550

SWC-550: improved fenced code block detection
SWC-556: support link is now a direct link
Merge pull request #292 from jay-hodgson/SWC-556

SWC-556: support link is now a direct link
Google site verification code change for www.synapse.org
SWC-557: show the DOI when not editable (but do not show the create DOI UI)
Merge pull request #295 from jay-hodgson/ro_doi_widget

SWC-557: show the DOI when not editable (but do not show the create DOI ...
Merge pull request #294 from jay-hodgson/seo_verify

Google site verification code change for www.synapse.org
SWC-43 home page improvements
upgrade bootstrap to include carousel
home page and header changes
swc-548 and swc-543 governance page
swc-553 added link for challenges
new link
bootstrap fix
Merge pull request #300 from dburdick/swc-43

Swc 43