- id maps are not editable
- handle exceptions thrown by the file reader
- texts are always above the edges
- store a default value for all maps, so that edges and nodes created after
adding a new map receive the default value too
- create node on button release, not on click (fixes a few oddities)

 AM_CPPFLAGS = -I$(top_srcdir)

 noinst_HEADERS = bench_tools.h

 noinst_PROGRAMS = graph-bench hcube bfs-bench

 graph_bench_SOURCES = graph-bench.cc

 hcube_SOURCES = hcube.cc

 bfs_bench_SOURCES = bfs-bench.cc