Crate slog_mock_proc_macros

Inner crate to implement procedural macros for slog-mock.

Macros

crit	Dummy logging macro, mimics slog::crit!.
debug	Dummy logging macro, mimics slog::debug!.
error	Dummy logging macro, mimics slog::error!.
info	Dummy logging macro, mimics slog::info!.
trace	Dummy logging macro, mimics slog::trace!.
warn	Dummy logging macro, mimics slog::warn!.