Fixes for MSVC 2008 in grap_adaptors.h and edge_set.h (#194)

Several renamings and changes in adaptors and edge sets

- Fixing scope usage for MSVC
- ResidualDigraph based on SubDigraph instead of FilterArcs
- Use initialize() in adaptors and edge sets
- Wrap ListDigraph for edge set tests

 prefix=@prefix@

 exec_prefix=@exec_prefix@

 libdir=@libdir@

 includedir=@includedir@

 Name: @PACKAGE_NAME@

 Description: Library of Efficient Models and Optimization in Networks

 Version: @PACKAGE_VERSION@

 Libs: -L${libdir} -lemon

 Cflags: -I${includedir}