changing some headings and adding new logos
changing tab heading labels
adding logos and correcting spacing

#the spacing of the logos works on my computer monitors, but may have to
be tweaked to work on others - hopefully it's ok though.
new files

4 r files added to the r folder (y/r and b/r routines from Mathieu)
2 data files added to the data folder (data and length abra alba files
merged into 1, .csv and .dat
1 pdf file added to main folder showing example of r plot from Mathieu's
routines
moving new files to correct folder
new spacing and naming of labels for Daniel
committing new version
Merge remote-tracking branch 'upstream/master'
deleted .ds_store