Added Fedes SPEC macros and reorganized repo

Moved scripts to pre-, scan and postscan directories, added SPEC scripts from Federica, so one does not have to copy them from her eAccount.
Use Tab after FolderName, added rec_DMP

David cleaned up the output a bit and  added rec_DMP as output
now works on Merlin as well as the beamline network
Added script to plot Delta/Beta

Based on data downloaded from CXRO, you can plot Delta and/or Beta of
a given compound.
To do that, go to http://henke.lbl.gov/optical_constants/getdb2.html,
request a "Text File", save it as .dat somewhere and plot it with this
script.
Useful if you have to talk with a user requesting Paganin reconstruction
of his scans...
Save resulting plot

Added 's'-Options to save the resulting plot as .pdf in the current
directory.
Merge branch 'master' of https://bitbucket.org/psitomcat/beamline-scripts
Merged in annabelle_medebach/beamline-scripts (pull request #1)

RotationCenterIterator for Merlin as well as the beamline network
pep8-ifying Annabelles additions.
PaganinPlotter updated to show values if requested

The PaganinPlotter now shows the Delta and Beta values of the chosen
energy at the end.
Also added an option to only draw the TOMCAT range of 8-45 keV if
desired.
Finally, the plot in the end is a bit prettier.