Fixed a bug in rb::Signals, previously it was dereferencing a NULL
pointer to fRbeerFrame when the GUI was disabled (batch mode or "-ng" flag).

::NOTE::
There are many instances of similar bugs in Signals.cxx, all need to be
fixed.
rb::Event::Instance<T> now returns T*& instead of Event*&
Fixed versioning bug in WrapTH1.hxx (was uncompatible w/ 5.34 due to return value changes of TH1::Add, Divide, Multiply)
 got rid of compiler warnings
Added const overloaded versions of operators to rb::data::Wrapper
Made printing of "mapped" classes use printf for formatting
About to remove Attach.cxx (hasn't been used for wuite a while).
Removed
Now linking to dynamic MIDAS
Fixed root versioning issue
Incorporating C. Stanford's Filter stuff - NOTE: I did this by simply copying his
files, not a true merge.  I *think* he only added so it should be okay... In the case
of problems, come back to this commit.
 Moved around filter button a bit
Added "Scaler" histogram & did gui updates as necessary.
Set default fill color of scaler hists
For histogram classes, moved call to Init() from the constructor into the
creation functions of hist::Manager. The reason is that Init() calls virtual
functions, and we shouldn't be calling virtual functions from the constructor
since the object isn't fully formed yet.
Got rid of old code that was commented in the previous commit. Also, some minor
documentation updates.
New implementation of rb::Mkdir - now iterates through file path
structure & creates new directories if old ones don't exist.
Added try...catch around buggy part of rb::Cd(), also Doxygen comment noting
that this function is buggy!
Fixed big in rb::Mkdir new version. Now cd()s to gROOT before starting to
parse the directory string - before it was starting from the current directory.
Made all hist class constructors protected and friended with hist::Manager.
rb::hist::Base - derived classes should only be created via hist::Manager, so
this now enforces that.