fix issue #1254 Allow the same context to be used multiple times in configuration
rm code that is no long used
Add this fix to HISTORY.md file
pass file path to ycb
update ycb package version
Merge pull request #1293 from lzhan/history

update HISTORY.md for pr #1286
Merge pull request #1290 from lzhan/samecontext

fix issue #1254 Allow the same context to be used multiple times in configuration
history update in preparation for release
Merge pull request #1295 from drewfish/history

history update in preparation for release
release 0.8.1 (based on 0.8.0-21-g5113a1f)
update arrow to v0.0.86