WICKET-5105 javadoc update
WICKET-5102
WICKET-5103 update session id on detach as in Wicket 1.4.x
WICKET-5073 UrlRenderer#removeCommonPrefixes() fails when contextPath+filterPrefix has more segments than the argument
Upgrade bootstrap to 2.3.1
WICKET-5111 Upgrade bootstrap to 2.3.1
Merge remote-tracking branch 'origin/master'
make it really obvious when wicket is handling an exception at dev time, otherwise it may slip by unnoticed
when handling a stale page attempt to reuse its conversation - because we most likely will render it
Non functional change - fix a typo in exception message
Explain in Javadoc that the methods throw exception when a field/setter/getter cannot be found
WICKET-5098
fix WICKET-5117 Wicket ignores allowDefault:false attribute in multipart ajax requests
WICKET-5116 corrected javadoc
WICKET-5112 parentheses are valid in url path
WICKET-5086 AbstractOptions does not use its model
WICKET-5117 Wicket ignores allowDefault:false attribute in multipart ajax requests

Prefix preventDefaultIfNecessary() with '_' to mark it as private since it is not part of Wicket.Ajax.** API and move it next to the other private methods
WICKET-5117 Wicket ignores allowDefault:false attribute in multipart ajax requests

Add unit tests
removed obsolete local variable
WICKET-5115 test that variables in default message are not substituted