optimize how expandInstanceForEnv() merges datastructures
Merge pull request #1120 from drewfish/perf3

optimize how expandInstanceForEnv() merges datastructures
release 0.6.0 (based on 0.5.9pr1-103-g74fdaa2)
update history file
Merge pull request #1134 from lzhan/history

update history file
Fixing broken link.
check if the page is not load
better checking
rm commented code
Merge pull request #1137 from lzhan/npmtest

Add checking of page loading.
update arrow
use ycb-based tokens like $$lib$$ instead of repeating subpaths

requires ycb@1.0.5; previously only the first token would be
replaced.
Changing the Node.js requirements for v0.6.
--keepTestReport for arrow 0.0.77
Merge pull request #1138 from isao/arrow

Arrow ~0.0.77, --keepTestReport, descriptors