fitting: runs limma's lmFit, contrast.fit, and eBayes in succession
In axelmuller/geometric2: NURSA annotation aid

runs limma's lmFit, contrast.fit, and eBayes in succession

1 2	fitting(my_eset = exprs, design = my_design, path2contrast_file = "contrast.txt")

`design`	this is a design object created with teh get_design() function its default value is design
`path2contrast_file`	the default is contrast.txt which is a table that contains the contrasts. It should have a column named Formula in which the contrast based on groups are given and anoter column named Contrast which gives a title for each contrast.
`exprs`	a ExpressionSet default value is exprs