ViewBS_v0.1.1 - Replace R with Rscript when running R scripts

The warnings generated when running R scripts will be gone because of the use of Rscript.

ViewBS_v0.1.0

1. Fix a bug because $opts_sub->{adjustXaxis} was not calculated.
2. Update the README.md
3. Update some of the comments.

ViewBS_v0.1.0-beta

update README.md