readMutation: function to read mutation from different file
In ytdai/gfplots: Interactive visualization function of gene mutations and fusions

readMutation is used to read mutation table from data frame or tab-delimited files.

1	readMutation(data, obj, update.data = FALSE, verbose = TRUE)

`data`	a data.frame or character. If data.frame, this must contain all basic information of mutation file. And if character, this must contain the file path of mutation file.
`obj`	a list object.
`update.data`	logical. If TRUE, the mutation.data in object will be updated. And if FALSE, it will generate a new list object which contains the data.
`verbose`	logical