fixed to re-create the userEx data, when the screenName & imageURL is
updated.
removing user is not necessary, since userAccessDao.put can update the data
made a button to recreate, but JSON will be shown in browser
use Ajax request to prevent showing JSON in browser
add empty line before method. refs #452
Merge pull request #455 from eller86/fix-issue-454

Fix recreateLuceneIndex button in admin page
add test case for cache-control and content-type to close #380
modified to using ObjectUtils & updating user data.
use better naming to tell intent. refs #456
modified to omit the unnecessary dao.put
Merge pull request #448 from takei-shg/takei-shg

fixed issues: refs #409, #447
Merge pull request #456 from eller86/380-test-for-api-header

add test case for cache-control and content-type to close #380
check that antisamy is not wrong. refs #417
disable URL conversion. refs #417
check parent to detect TinyMCE. close #457
Merge pull request #458 from eller86/417-broken-onsite-url

Fix broken onsite url
Merge pull request #459 from eller86/457-needless-caution

check parent to detect TinyMCE
support Summary Card by Twitter.

To know about Summary Card, read this document.
https://dev.twitter.com/docs/cards/types/summary-card

This change will make our event page Summary Card ready.
I did not test with validator, because it cannot parse webpage
which hosted on localhost.
Merge pull request #466 from eller86/twitter-card

support Summary Card by Twitter
return updated content instead of eventId. refs #435, #444, #461