I have been trying to install some packages on mac os x with mixed 
success. As a result of my messing around my packages database is all 
messed up. For example pkg_info (is there any way to clean up the 
output of that thing?) shows that I have  ORBit-0.5.10_2,  
ORBit-0.5.12,  ORBit-0.5.16,  ORBit-0.5.17 installed. I presume this 
was some sort of a dependency item because I did not install it on 
purpose.   My question is how do I clean up this mess?