Updates to dragonfly code: added nearest router communication pattern

git-svn-id: https://subversion.cs.rpi.edu/svn/rossnet/trunk@687 2481c9be-fdbf-de11-a427-00b0d041e3d9
Updates to dragonfly model: fixed a bug in nearest router traffic pattern

git-svn-id: https://subversion.cs.rpi.edu/svn/rossnet/trunk@688 2481c9be-fdbf-de11-a427-00b0d041e3d9
Merge remote-tracking branch 'upstream'