Added "remember me"-checkbox

A checkbox for extending the session timeout to 10 days has been added
to the login page.
Fix for buttons on archived stories
The expand/collapse button is now working on archived stories.

Fixes sonyxperiadev/BacklogTool#62
Disabled double click on stories in edit mode
It is no longer possible to double click on an story to close
it again. This forces the user to make an active choice whether to
save or cancel the changes.

fixes sonyxperiadev/BacklogTool#45
Fixes that it was not possible to edit theme after cancel
Fixed remember me option for LDAP
The remember me option now  works with LDAP login.
Merge pull request #67 from fredrikpersson/disable-doublecick-on-edit

Disable doubleclick on edit
Fixed positioning of options menu

The options now gets the correct position even if
the user has scrolled down the page.
Moved login error text to new line
Merge remote-tracking branch 'upstream/master' into HEAD

Conflicts:
	src/main/webapp/resources/js/scripts.js
Merge pull request #65 from fredrikpersson/archivebuttonfix

Fix for buttons on archived stories
Merge pull request #60 from fredrikpersson/rememberme

Added "remember me"-checkbox
Merge pull request #69 from fredrikpersson/menupositionfix

Fixed positioning of options menu
Merge branch 'master' into move-to-area2

Conflicts:
	src/main/webapp/WEB-INF/views/header.jsp
	src/main/webapp/resources/css/styles.css