workaround how arrow is tweaking with console.debug()
Merge pull request #923 from drewfish/debug-arrow

workaround how arrow is tweaking with console.debug()
release 0.5.2 (based on 0.5.1-166-gc8b8a46)
add more unit tests for help command
Fixed typos and incorrect link.
Merge pull request #924 from lzhan/addunittest

add more unit tests for help command
Fixed a link because YDN won't let users jump to certain hyperlinks.