Remove dead code
Merge pull request #129 from wmde/rd

Remove dead code
Have dedicated inserters for different entity types

This finishes https://github.com/wmde/WikibaseQueryEngine/issues/40 for the
code internal to the store. Now all that is needed is updating the public
interface

The same mechanism is also present for removal, though
just has a single trivial implementation for all entity types
so far. This can easily be changed once the store needs it.

The dedicated class for updating was removed, rather than
made more elaborate, since the current thing done is trivial
and can be done for all entity types.
Merge pull request #128 from wmde/evidence-of-thiemo-killing-the-kittens

Have dedicated inserters for different entity types
More DataModel 2.0 updates
Merge pull request #131 from wmde/claim-to-statement

More DataModel 2.0 updates
Remove unused imports
Merge pull request #130 from wmde/most-funny-cat-video-ever

Remove unused imports
Add PSR-3 logger interface

For now just added to the setup code, also needed elsewhere
Remove dead code
Use EntityDocument instead of Entity
Merge pull request #133 from wmde/rdc

Remove dead code
Merge pull request #134 from wmde/entitydocument

Use EntityDocument instead of Entity
Merge pull request #132 from wmde/logger

Add PSR-3 logger interface
Update RELEASE-NOTES.md
Update RELEASE-NOTES.md
Improve docs
Improve docs
Remove dead code
Merge pull request #135 from wmde/rdcc

Remove dead code