CHIP-Seq: R adds a X to filenames starting with numbers
snipet from Mikhail:
chipseq processing filenames which are starting with a number
a changed by adding "X" at the beginning of the filename. The reason
seems that new version of R automatically adds "X" in front of colname
which does not start with a letter.
I believe that this is not a big deal and we can fix that thing later.