Tries to make the cache directory configurable.
When Bolt is installed with Composer, look for config in config/ExtensionName.yml so it exists in the config dir outside the Bolt dir
Can ignore complete contenttype in sitemap
Explanation that slug is used to define what to ignore
Merge pull request #938 from richardhinkamp/extension-config-composer

Extension config and installed with Composer
Merge pull request #939 from richardhinkamp/sitemap-ignore-contenttype

Sitemap ignore contenttype
Merge pull request #937 from andersonamuller/master

Fixes #705