Added img size for landing. Member images v.center

Added img size for landing. Member images v.center

Image size just for landing pages has been added as 250x125, where
before it was using the 200x100 glm_block image size.
Member images got a vertical centre with jquery to properly crop
from both bottom and top.
Reduced sidebar size on pages containing member lists so that the
member section can be wider.
Changed styles of the UL>LI forming the sublinks for the member
list grid view, so they would wrap and not be covered.