Create set of matrix utilities to store a matrix in row major form about ece420lab4 HOT 4 CLOSED

This goes with #3

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Didn't make these signatures correctly when opened the issue.

double get_element(double*A, int row_size, int i, int j);
void set_element(double*A, int row_size, int i, int j, double value);

// The matrix argument would be just a pointer
// That is, it has not already been malloc'd
// mallocing the memory would be the job of create_matrix
void create_matrix(double ***matrix, int height, int width);

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I did a quick and dirty implementation of this right in utilities.Needs some cleaning up and documentation but you can take a look at it if you are stuck at all.

Also this version of "init_edge_matrix" inserts the number of outgoing edges.

utilities.c

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I apologize if you got very far on this, I didn't mean to step on your toes. But I pretty much had to implement this to move forward with testing the algorithm so I'm just going to close this.

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