Complete changelog for v2.6

Merge pull request KnpLabs#399 from andygajetzki/master

adds bulma css paginator template

Merge pull request KnpLabs#352 from PBWebMedia/treat-underscored-vari…

…abled-as-hidden

Hide underscores parameters from the url. Underscored variables shoul…

update composer dev version

Merge pull request KnpLabs#342 from GrzegorzW/master

Fix README.md

Merge pull request KnpLabs#296 from VincentLoy/master

add Foundation 5 Sliding pagination control implementation template

Merge pull request KnpLabs#302 from bocharsky-bw/patch-1

Use more relevant method to get current page value

Merge pull request KnpLabs#264 from tavish/patch-1

Update KnpPaginatorBundle.php

Merge pull request KnpLabs#232 from n1c01a5/master

CS

Readme count items example update