Add caching to api data

[maartenvn]

Right now a lot of components have to pass data causing long pass through streams of certain information.
Introducing a caching layer would allow these components to do a request by themselves.
If the data has already been fetched, it would not send a request, but rather return the cached result.

The cache layer should have the following characteristics:

• Cache is session specific.
  Reloading the page will not serve the same cache, but rather build a new one. This is important since the data present is rather subjective to change.

• Cache should be updated automatically when updating/deleting data
  Eg: when a project is deleted using DELETE /projects/{id} it should also be deleted from GET /projects or GET /projects/{id}

• Cache should work completely transparent to the components