define scala.home, for more robust startup of Scala tools, notably the compiler;

added jEdit Console and Scala compiler;

some attempts at Scala console plugin;

more precise treatment of document/state assigment;

more precise notion of bad messages;

use Text_Edit provided by Isabelle;

result.is_ready is not bad;

singleton status messages, with more precise patterns -- report bad messages;

back to explicit management of documents -- not as generic Session.Entity -- to avoid ill-defined referencing of new states; recent_document: require finished state assignment; explicitly typed Session.lookup_command;

slightly more uniform/robust handling of visible document; uniform changed_delay for view updates; misc tuning;

recovered explicit Changed.id (copy of future document) -- avoids premature joining of result; Change.ancestors: frugal iterator;

more explicit treatment of command/document state; misc tuning and clarification;

removed unused document_change bus;

tuned;

tuned;

misc tuning;

tuned Change: eliminated redundant copy of document id;

eliminated redundant session documents database; tuned;

use isabelle.Future; tuned;

renamed current_document to recent_document (might be a bit older than current_change); Change: explicit future value of Document.Change instead of implicit lookup in Session database; Document_Model: apply Document.text_edits here (as future);

renamed Proof_Document to Document;

tuned dialog;

improved dialog;

basic setup for synchronous / modal (!) prover startup;

tuned signature;

register Proof_Document instances as session entities -- handle Markup.EDIT messages locally;

tuned signature of isabelle.Position;

maintain generic session entities -- cover commands, states, etc. (but not yet documents);