create_geneAdj_and_mutM-

 I ahve added a function called extract samples that takes a samplenames
 from a metadata variable, the large metadata tables calulcated from the
 metadata tables that come with TCGA and the small metadata variable. It
 identifies tha sample names that match in the metadata variable to the
 metadata large table, gives the index of these samples in the metadata
 variable and outputs the appropriate samples metadata which now are
 guaranteed to be present in the larger metadata table