* scripts/lilypond-book.py (Compile_error.process_include): catch

* scripts/lilypond-book.py (Compile_error.process_include): catch
Compile_error exception, and remove output .texi.

* scm/define-music-properties.scm (all-music-properties): add
error-found

* lily/parser.yy (Music_list): add error-found to music with errors.

* lily/lily-parser.cc (LY_DEFINE): ignore scores with errors.

* lily/book.cc (process): ignore books with errors

* lily/include/score.hh (class Score): add error_found_ member.