add test names to edgeR output tables

matricies of p value, FDR, logFC etc now have column names describing
the test to which they relate
add example edgeR glm sample file

Add an example of the R config file which inputs the experimental design
to the edgeR_glm_multifactor.R script
rename edgeR glm script
add getGOterms.R

Add an R script which gets GO term tables and mapping for use with topGO