----------- - ``add_stale_tick()`` made thread-safer
1.5.53a
----------- - ``Blotter`` market data handlers now using threaded, non-blocking architecture. - Misc bugfixes, code improvements, cleanup and abstraction
*December 21, 2016*
1.5.52a
----------- - All market data events are now asynchronous / non-blocking - Misc bugfixes, code improvements, cleanup and abstraction
*December 20, 2016*
1.5.51a
-----------
- Minor bugfixes, code improvements, cleanup and abstraction
1.5.50a
-----------
- Minor bugfixes, code improvements, cleanup and abstraction
*December 19, 2016*
1.5.49a
-----------
- Fixed bugs that may occur on multi-instrument strategies - Misc code improvements, cleanup and abstraction