Proto commits in larics/cartographer_frontier_detection

These 2 commits are when the Protocol Buffers files have changed:

Commit:4fd4147
Author:Juraj Oršulić

Merge commit 'c6dad886cf27acecb3001b359a5f499c17ab6abd' as 'cartographer'

The documentation is generated from this commit.

Commit:c6dad88
Author:Juraj Oršulić

Squashed 'cartographer/' content from commit d7b46567 git-subtree-dir: cartographer git-subtree-split: d7b4656741bbf99f922c5ea7dddf15a1a74aec0f