Changes to FElt from 1.0a to 1.3 (consecutive public releases) -

The following changes were made to the FElt syntax:
   1. addition of 'hinge' or 'h' as a keyword after the R[xyz]=
      token in a constraint to indicate a hinged DOF
   2. addition of a valid expression after the T[xyz]= or R[xyz]=
      token in a constraint to indicate a displacement boundary  
      condition.  Tx=c for examples is now equivalent to Tx=0.0.
   3. directions 'x','y', and 'z' are no longer valid.  This is
      the only backward incompatible change to the syntax.  Valid
      directions now include LocalX, LocalY, LocalZ, GlobalX,
      GlobalY and GlobalZ.  Check the element definitions in the
      user's manual to see what these things mean.
   4. you can now use sqrt() in expressions (just like you   
      you could use sin, cos and tan before).

The following bugs were fixed:
   1. a bug in xfelt which caused a core dump when you tried to
      draw a problem in 3d when it was only a 2d problem.
   2. a bug in the internal forces calculated for beams which always
      caused the second end moment to be printed as zero.
   3. several bugs in 3d beam elements including an error in the
      global <-> local transform matrix and a typo in the resolution
      of distributed loads.  I think they actually work now :-).
   4. not really a bug, but the directions of loads on beam elements'
      got straightened out and is probably a bit more consistent now.
   5. consistency amongst text commands, menu options and keyboard
      shortcuts was substantially improved.
   6. does the original user's manual count as a bug?  Well the new one
      should actually print on any old postscript printer, plus it
      contains a wealth of new information and is organized a whole lot
      better.

The following features were added:
   1. hinged DOFs, displacement boundary conditions.
   2. a simple, illustrative Timoshenko beam element.
   3. plotting of 2d planar stress fields with color imaging in velvet.
   4. plotting of the displaced structure in velvet.
   5. loads directed along the global coordinate axes on beams and beam3ds 
   6. a real file selection mechanism for velvet
   7. much improved, consistent, self-contained force, material, 
      load and constraint dialogs in velvet
   8. unified node and element edit/info dialogs
   9. a problem solution control dialog in velvet
  10. unified interface mechanism for all the dialogs, including tab groups
      and the ability to leave dialogs up throughout a work session
  11. translation include files and a built-in include path for cpp
      in felt and velvet.
  12. element numbering
