Bugfix for checking existence of theme
Changelog updated
'Core' should remain 'core'
Merge pull request #765 from jeroendesloovere/bugfix-install-theme

Fixes installing a theme
Fix merge conflict in changelog

Please enter the commit message for your changes. Lines starting
Merge branch 'jeroendesloovere-bugfix-pages-previous-next'
Use Core instead off core
Merge branch 'jeroendesloovere-bugfix-core-theme'