Properly filter process_open_sockets when pid=-1 (osquery#4234)

tests: Fix compression test failing for Sierra osquery#4139 (osquery#…

…4216)

mac/linux: add disk I/O columns to processes table (osquery#4204)

process_file_events: Add fields euid and egid and cleanup logs

website: Upload dark version of logo for README (osquery#4065)

docs: typo in mac setup instructions (osquery#4010)

deps: Update Linux and macOS boost to 1.66 (osquery#4018)

hash: Use the hash-cache by default and document flags (osquery#4006)

tables: augeas: Remove trailing slash from /files prefix (osquery#3967)

tables: expanding windows programs table to encompass apps without GU…

…ID (osquery#3945)