modernized theory setup;

store blobs / inlined files as separate text lines: smaller values are more healthy for the Poly/ML RTS and allow implicit sharing; integrity check of SHA1 digests produced in Scala vs. ML; tuned signature;

more symbols;

more symbol abbrevs to support HOL library maintenance;

reparse only for actually changed blobs; tuned signature;

proper document blobs for initial edit, which is relevant for loading auxiliary file buffers;

more formal Document.Blobs; removed junk;