Squashed commit of the following:

    Added boost libraries to be loaded with HftMatTree option

    Added boost_program_options because StHftPool/HftMatTree depends on it
    Added boost_regex because StHftPool/EventT depends on it
    Added boost_filesystem because StHftPool/HftMatTree depends on it

    Added BFC options for full IST hit reconstruction i.e. raw hit -> cluster -> hit. Also added options for future IST
    modules istFastSim, istQA, and istCalib

    Changed -Opt to NoOpt as the former does not seem to have any effect

    Change to get rid of doubly defined StiMaker attributes

    Removed redundant dependancies by taking advantage of dependant option chains

    Add explicit dependence of PxlHit on PxlCluster on PxlRaw packages

    Updated sstHit option to do something useful

    SST changes from Jonathan Bouchet

    Added option to create a tree used in event display