Changes

Summary

1. merged
2. Added tag Isabelle2017-RC3 for changeset 4f73201b8043
3. updated component: static build of for x86-linux, using actual cvc4 1.5 (see also c41642bc1ebb);
4. updated CVC4 and E components with 32-bit Linux and rebuild 64-bit Linux binaries
5. updated screenshots;
6. misc tuning and updates for release;
7. avoid duplicate message for @{action} in particular (see also @{action} within Pure);
8. more on indentation;
9. clarified "purge": retain .aux files etc. before "isabelle document", to allow 'document_files' providing such generated files (see also c3ea910b3581, 38ce936acb99);
10. clarified signature according to Scala version;
11. updated version for release;
12. proper result type (cf. b9f5cd845616);
13. recode Unicode text on the spot, e.g. from copy-paste of output;
14. support for workspace edits;
15. store document version;
16. auto update;
17. updated imports;
18. more documentation; tuned message;
19. more derived actions, according to jEdit/org/gjt/sp/jedit/gui/DockableWindowFactory.java;
20. proper tool name (cf. c1410bcf6e87);
21. proper standard_path to revert platform_path in JEdit_Sessions.session_base;
22. avoid local shell variables intruding the resulting environment (via "set -o allexport" in getsettings);
23. clarified messages: after writing all files (see also 27f90319a499 and 57c85c83c11b);
24. spelling
25. clarified signature: proper result;
26. tuned;