Implement parallel page rank with MPI

[ryant26]

An easy approach would be :

• Broadcast the entire weight matrix to every process
  • The last column in the weight matrix needs to contain the number of outgoing edges for that node
  • IE Weightmatrix[n][i] contains the number of outgoing edges from node i
• Each process calculates the page rank for a subset of nodes (the size of the subset depends on the number of processes)
• The master process gathers all the page ranks for that iteration
• repeat.

[ryant26]

This goes with #4

[jbcuglietta]

to be completed by @ryant26