update HISTORY.txt for v6.4

Merge to v6.4
This commit is contained in:
Matthew Flatt 2016-01-17 16:34:28 -07:00
parent 1204aacd70
commit edd117d414

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@ -1,3 +1,8 @@
Version 6.4, January 2016
Changes noted in the documentation, including support for
incremental garbage collection
Performance improvements and bug repairs
Version 6.3, October 2015 Version 6.3, October 2015
Bug repairs and other changes noted in the documentation, Bug repairs and other changes noted in the documentation,
including substantial changes to the macro expander including substantial changes to the macro expander