[Add]: Notify command - basic list
[Mod]: Keep images alt text when strip tags.
[Add]: Util func pad_str and pretty_date.

pad_str: Properly pad Chinese strings.
pretty_date: Relative datetime string.
[Mod]: Format status better.
[Mod]: status & notify now have --page-size option
Merge branch 'develop'

Conflicts:
	renren_commands/status_cmd.py