** Moved permission check implementation into SecurityContext from
SecurityInterceptor
** Added permission check for FORUM_POST_MODIFY
** Added edit link into forum posts
** Added new methods updateContent and updateModified into ForumPostDAO
** Added method for resolving index of post in topic into
ForumController
** Added method for updating post content into ForumController
** Added view for editing forum post content
** Fixed bug in ForumEditPostBackingBean that caused unauthorized users
to crash view