fixup core_mailurl
make bottom bar transparent too
Merge pull request #67 from CircleCode/3.2/fixup/core_mailurl

fixup core_mailurl
Merge pull request #69 from CircleCode/3.2/transparent-navbar

make bottom bar transparent too
add wsh_ref chapter
add cleanFamily api
Merge pull request #71 from CircleCode/3.2/wsh_ref

init wsh_ref chapter