Temperamental to Unicode

[James-Oswald]

Bibtex files are generated with unicode characters occasionally. So far we just have U+0308 which breaks the pdf generation step.
We've added \DeclareUnicodeCharacter{0308 }{} to main.tex to fix this specific issue, but it is not a general solution, in the event more unicode characters are in new DBLP bib entries this will break the pdf generation step. Create a general solution that handles all unicode characters.