pageStorage with Tests and refactoring of api-index function
New function getcontentashtml
Merge branch 'feature/pageStorage' into develop

* feature/pageStorage:
  New function getcontentashtml
  pageStorage with Tests and refactoring of api-index function
Merge branch 'develop' of https://github.com/janbaer/mdwiki into develop

* 'develop' of https://github.com/janbaer/mdwiki:
  Content changed