Issues 87 & 88

Both 87-PV-More detailed unit staff list and  88-PV-More detailed
patient list are done.
About "All units" query problem, I cann't replicate it.
About "Prev/Next" links  problem, I cann't replicate it too, and I
remembered that I had fixed this problem.
Merge pull request #69 from lu-yang/develop

Issues 87 & 88