first big step of feature #5397
feature #5515 : making reusable 'thumbnail' JSP tag
feature #5515 : improving Period.java. Now manages undefined begin and end dates.
feature #5515 : improving brand new displayThumbnail.tag
feature #5515 : improving statistic service
Now, it is compliant with SilverpeasContent resource
feature #5515 : portlet 'quickinfo'
removing portlet JSP from Core (move to Components/quickinfo)
feature #5515 : improving 'displayLastUserCRUD' tag
Accepts both new attributes : publishByUser and publishDate
feature #5515 : improving 'thumbnail' service by making it even easier to use
feature #5397 : ticker is done and desktop notifications works with Chrome and Firefox
feature #5515 : fixing 'quickinfo' portlet
feature #5515 : fixing PublicationDetail.java to manage correctly Period with hours
feature #5515 : adding full support of 'blocking' news after user authentication
adding new mechanism which allow components to hook on authentication
adding new method to know if a user have read a content : StatisticBm#isRead
on feature #5515 : check if date are defined when formatting it (check undefined date according to Minimum and Maximum date)
feature #5515 : last small enhancements
closing feature #5161 and #4451 : in user panel, groups can be always browsed
closing feature #5515 : underlining link of inlineMessage
feature #5497 : displaying global favorite operation only on main page of applications
closing feature #5515 : integrating images resizing
Merge branch 'ney-feature-5515'