File not found src/monero_headers.h
I'm have problem on make:
all files, included in src/monero_headers.h not found. Folders like cryptonote_core/ or blockchain_db/ not exist too. 
What it is files and how create\where download it? Thanks.

Example error 
`/home/user/onion-monero-blockchain-explorer/src/monero_headers.h:19:37: fatal error: release/version/version.h: File not found
`