support large byte arrays, using multiple "chunks";
support incremental builder;
clarified "limit" (valid >= 0) vs. "hint" (valid > 0);
clarified byte access: prefer unchecked acces and iterators internally;
src/Pure
src/FOL
src/HOL
src/ZF
src/CCL
src/CTT
src/Cube
src/FOLP
src/LCF
src/Sequents
src/Doc
src/Tools