Abort without error message, and pdf manual bug

[A. Deubelbeiss]

Lily 2.6.3 and 2.7.11, Windows versions. Win XP (SP2).

When Lilypond encounters the ’ character, the program aborts without 
mentioning the fact in the .log file. (Note that the Windows versions 
don't have a console open at that point; other platforms may get an 
error message there for all I know.) The process simply disappears, and 
the .log ends at "Parsing ..."

This by itself would be an exotic issue, but there's a real problem in 
there: in the .pdf version of the manual, code examples involving scheme 
have ’ instead of ' as the quote mark character. The result: When a user 
copy-pastes a sample \override or similar from the pdf manual, 
processing the file breaks in a confusing and unhelpful way.

The html manual is fine.