Merge branch 'release/0.9.8' into develop
added ksort filter
Added 'contains' filter and 'gist' function
Fixed a broken getSibling() function on the page
Added a new `@page` collection type to take a parent page
updated composer
PSR Fixes
added useful toArray() method on Iterator
refactored page prev/next/adjacent so they work!
switching to Symfony 2.6 for yaml/console/event-dispatcher
Revert "added useful toArray() method on Iterator"

This reverts commit 92159d1df85d385e9b4a039e92daa517257da63c.
version update
Merge branch 'release/0.9.9'