Merge pull request #14 from migueldvb/local

Add new author: Paul Hartogh
Add author: Klaes
Dispense with footnote on forever FITS and cite V1 of standard properly
Fix quoting of title
Allow line breaks of URLs

Some of the URLs were causing trouble because of their length
Put Library of Congress document in references
Move CONTINUE to references section

To be consistent with HIERARCH
Should be citep not cite
fix spacing after period in e.g.
Suggest reformulating last part of 2.1.4 as a critique of FITS, not
a requirement for a new format.
Remove extra space in citep command
Use comma after i.e. to be consistent with American English spelling
Add author: Craig
Add new author: Homeier
Mention CLASS data format in introduction and add a reference

Fixes #16
Add ascl reference to GILDAS and remove bibliography ascl entry
Fix the parentheses again for "present and future"

Inadvertently split in f62cc222ca2425947ef8117a9b3d28997ad24390
Add a paragraph about simulation data and reference to Turk et al 2011