make a wrapper for wrapGraph in LINK_STk.h
inducedSubgraph() has default value set in .cpp - move to .h
wrap permutation operations into the STk interface
documentation:
fix manual generating program so it doesn't generate index entries with
names starting with "Prog" or "User" - probably eliminate the use of 
c_filter.cpp - just use filter for both .tbl and .crt
change method definition to test whether symbol is defined, define it if not
(instead of defining it in C++pointer.cpp)  will make startup even slower,
but extending easier.
fix leak in dissolveSubgraph - some memory is not deleted that should be
include option to output Polka animations 
incorporate protocol like Tcl_Dynamic, etc. for dealing with dynamically
allocated Attributes (currently leaks them)
Manual:  ProgDFSTest.cpp doesn't compile because List<AnimationData*>
         isn't instantiated and some STk stuff makes it in (run make libs?)
segfault: (define g2 (graph '(1 2) '((1 2) (2 3))))
parser:  keywords "GRAPH UBINGRAPH" (etc.) should not be mandatory, but
         they are currently needed during parsing of graphs with subgraphs.
vertex-size: changes in *link:default-vertex-size* should cause a change 
	     in C++ default vertex size.  Currently DEFAULT_VERTEX_SIZE
	     is a symbolic constant.
Graph.h: reconcile methods and functions accepting Graph* and Graph&
