Proto commits in OsmSharp/core

These 7 commits are when the Protocol Buffers files have changed:

Commit:53bd5a8
Author:ben.abelshausen
Committer:ben.abelshausen

Refactore to .NET core project structure only.

The documentation is generated from this commit.

Commit:7b8e04d
Author:ben.abelshausen

Refactore to .NET core project structure only.

The documentation is generated from this commit.

Commit:60ebfac
Author:ben.abelshausen

Refactored to another project type.

Commit:f01a13d
Author:xivk

Added PBF streams again.

Commit:1fcda82
Author:xivk

Moved base OSM objects to OsmSharp namespace.

This commit does not contain any .proto files.

Commit:b6d443b
Author:xivk

Big reduction in code footprint by merging cache and snapshotdb logic.

Commit:1e7bcb3
Author:xivk

Initial commit.