[sub-lib] redesigned it: redesign 'share', no sync ...
* no 'sub-libraries' at 'myhome'
* don't create event when create sub-lib
* no 'sync'
* 'syncable-share' --> 'private share', no second popup
[sub-lib] improved ui & fixed bug for private-share
merge 'create_sub_lib' into 'check_sub_repo'; improved file/dir share js code