more efficient Markup_Tree, based on branches sorted by quasi-order;
renamed markup_node.scala to markup_tree.scala and classes/objects accordingly;
Position.Range: produce actual Text.Range;
Symbol.Index.decode: convert 1-based Isabelle offsets here;
added static Command.range;
simplified Command.markup;
Document_Model.token_marker: flatten markup at most once;
tuned;
## targets
default: LNCS
## global settings
SRC = $(ISABELLE_HOME)/src
OUT = $(ISABELLE_OUTPUT)
LOG = $(OUT)/log
USEDIR = $(ISABELLE_TOOL) usedir -i true -d ps -D document -v true
## LNCS
LNCS: $(LOG)/HOL-LNCS.gz
$(LOG)/HOL-LNCS.gz: LNCS/ROOT.ML LNCS/document/root.tex LNCS/document/root.bib LNCS/*.thy
@$(USEDIR) HOL LNCS
## clean
clean:
@rm -f $(LOG)/HOL-LNCS.gz