Updated wicket version to 6.7.0
ref: inherit code from stateful headers toolbar
ref: now uses IConverter to properly handle non-string sort parameters
ref: removed coupling between header toolbar and page
add: tests to verify sorting works correctly
fix: stateless test now checks entire component hierarchy for stateful components
add: new stateless link that adds page parameters
ref: major internal changes
rem: removed dead code after header toolbar refactoring
ref: added utility assert to check statelessness
fix: updated stateless test for paging navigator
mod: paging navigator now require parameters to be provided rather than asking the page
ref: better mock usage in the test
mod: parameter link now defaults to the current page if a specific page is not provided
mod: parameter link now accepts objects as value instead of only strings
ref: major internal refactoring of stateless paging navigator
add: test to verify paging when the parameter is set
fix: fixed typo in properties file
updated dependency versions
ref: inline control group now modifies to existing components css classes instead of replacing the entire html
ref: removed duplicate code and useless inner class
fix: fixed stateless test
mod: stop spitting out sql
add: stateless test to expense page