Compulsory numerical exercise 1

Compulsory numerical exercise 1: Stellar spectra. A: basic line formation. Deadline for handing in the report (in LateX): Monday Sep 30, 2013. Ignore Sections 1.1 and 1.2. The links in Section 1.3 and 1.4 do not work, the correct links are: brief IDL manual and Latex instructions