Betfair-data

Fixed issue in mutable parsing that incorrectly handled the image field.

Betfairlightweight compatibility finalised
Committed py_src testing scripts
Fix deadlock in tar source when number of tars greater then thread pool size

Fixed incorrect timestamp bug

Added new recorded file's api
py
for m in betfair_data.Files(glob.glob("data/stream/*"), cumulative_runner_tv=False):
pass

Added custom allocator (mimalloc) for windows/mac.
Added simd utf8 parsing lib, and moved parsing into the workers

~+15% increase in throughput performance

Throw error on multiple market files.
Enable cargo perfomance enhancements (lto)