use accessor instead of direct access to field. refs #407.

accessing field directly makes debug little hard, because
IDE cannot make 'call hierarchy' correctly. and it is good
habit on OOP programming, I think.
return currentURL instead of redirectURL. refs #407.

we can use curent URL to redirect in normal case, so
just use 'currentURL' instead of 'redirectURL' if
redirectURL is not specified.
removed unused extension. refs #428

we do not have to add extension to URI.
just remove it would solve our problem.
removed needless extension. refs #430
Merge pull request #431 from eller86/fix-430

removed needless extension. refs #430
Merge pull request #429 from eller86/fix-428

removed unused extension. refs #428
Merge pull request #425 from eller86/407-redirect-from-anywhere

redirect after sign in from anywhere
wrap eventId by double quote. refs #423
add URL into side bar of event page. refs #433
add test case to reproduce. refs #406
use offset to search events. refs #406
bump up twitter4j to version 3. refs #434
support to show/edit hashtag. refs #377

now PARTAKE can support hashtag!
it let user to distribute information easily, provide view to
collect information quickly.

this feature contains verification for hashtag editor.
hashtag should starts from "#".
Ask before finishing modification. refs #418

to detect modification, I count number of input box in page.
if page contains visible and enabled input elements, it means
that user is still modifing some attributes of event.

to use button to judge, "save" button should be disabled by default.
I added some code to switch enabled/disabled status of "save" button.

I know that it is bad way for logic to use status of DOM,
but I think it is acceptable in this case: other way costs too much.
Merge pull request #436 from eller86/fix-423

wrap eventId by double quote
Merge pull request #438 from eller86/fix-406

Fix 406
Merge pull request #439 from eller86/fix-377

support to show/edit hashtag. refs #377
Merge pull request #440 from eller86/fix-418

Ask before finishing modification. refs #418
Merge branch 'master' into fix-433

Conflicts:
	app/views/events/_show_side_information.scala.html
Merge pull request #437 from eller86/fix-433

add URL into side bar of event page