WICKET-4686

Make it possible to use named mandatory and optional parameters in the url mounted with PackageMapper
Revert "WICKET-5224 Revert "WICKET-4948 fix vertical centering of modals in safari""

This reverts commit 0cecd7fdfa449240f39aaa991c5f6c3046bc3c53.
WICKET-5439 Allow restarting AbstractAjaxTimerBehavior without updating
its hosting component; simplified header writing
WICKET-5439 more flexibility: allow stop and restart without ART,
clean-up timeout-handle when shouldTrigger() returns false
Remove unused class (since 1.5.0)
Upgrade Spring to 4.0.0
Upgrade CGLib to 3.1
Update Jetty 9.1.x to its latest release (9.1.0.v20131115)
WICKET-5442 fixed Time.getHour() to use 24-hour clock
WICKET-5443 Increase randomness and reduce predictability of CaptchaImageResource rendered images

increase "randomness" and reduce predictability of CaptchaImageResource rendered images
Add Apache licence

(cherry picked from commit 3aff2f5fbdb98a0a05f2724a70f86068583d4dc9)
WICKET-5435 Ajaxified version of WebSession#getClientInfo should be added

(cherry picked from commit 90235c1c2ef7eb6ffa9d5d836ce7d0a398ca2821)
Add licence

(cherry picked from commit 7fcbfe7bc4172c8671ab037c73780c1006d1704d)
WICKET-5435 Ajaxified version of WebSession#getClientInfo should be added

Since it uses Ajax it should be *Web*ClientInfo

(cherry picked from commit a2c21b134d0c855a1c1c7cd3d83ff1ad93c068d6)
WICKET-5435 Ajaxified version of WebSession#getClientInfo should be added

Introduce AjaxClientInfoBehavior that collects the client info.

(cherry picked from commit c84f0c25bf86731e5abdaa1899def55f2545ee90)
WICKET-5435 Ajaxified version of WebSession#getClientInfo should be added

Fix settings class name
WICKET-5444 Make org.apache.wicket.pageStore.memory.PageTable public so custom impls of IDataStoreEvictionStrategy can be made

(cherry picked from commit ded718cf9ce1d8a61e7ff33327e29c22ddce4681)
Add 'change' Ajax link next to the captcha image to show how to refresh/change it.

(cherry picked from commit e594bb85675eab0a3dfd7fdec738fada07b9607b)
WICKET-5445 Make CaptchaImageResource easier to extend and reuse

Make CaptchaImageResource easier to extend and add demos with Kaptcha and Cage libraries

(cherry picked from commit 853b568a5e75305722e487b85082eb923f8b6d31)
WICKET-5441 IResourceCachingStrategy implementations should only set caching if version matches