example todo
fixed; do not save user defined transforms

closes #1415
fixed; RangeError in ValidationError.toString()

closes #1296
fixed; nested deselection conflict

closes #1333
fixed; +field conflict with $slice

closes #1370
tests; fix race condition
release 3.6.4
now working on 3.6.5
Merge branch '3.6.x' into gh-pages
website; regen for 3.6.4