Keith Ching - 2016-03-11

Discovered that some data sets like TCGA-LAML may have different sample ids between data types like expression and mutation for several patients. This can result in the loss of mutation calls when merging samples. It effects the expression_plot, expression_mut, mutation_exp, and venn functions. The code has been fixed internally but remains to be tested further before pushing out to the repository. Additionally, the RData mutation file for TCGA-LAML for genomewide searches is out of date and will be updated as well.