Add file format and units tables
Move Flux column entries under Flux Density
Potentially fix 65 (redshift operations). Move 'details on Iris features' to begining of sec 2.1.
Fix caption, layout, and table footnotes.
Add Pepi's feedback. Edit Sec 2 intro. Add Aneta to acknowledgements. Add Aneta ref for PKS. Add Refsdal et al (2009) for CIAO ref.
Update units.tex table.
Add units2.tex, which reformats units.tex. Edit tables.
Edit intro. Edit table layouts. Add units2.tex table. HYPERREF NOT ON
Edit tables. HYPERREF NOT ON.
Remove spectrophotometric references to Iris itself. Still keeps spectrophotometric when describing data models.
Update Section 2 intro. Add references. Clarify table model units. Add Sherpa stats section.
Merged bb196295fe9f1d1. HYPERREF NOT ON.