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* Bugfix for restart / run all;
* Bugfix for IPython version
* Unify dependency management for statements and cells;
* Bugfix for correct active cell use during nbextension active cell run;
* Fix IPython dependency for different Python versions;
* Allow exec schedule recomputation on cell content change;
* Add API for symbol tagging;
* Code HTML widget with links for jumping to cells / copying slice;
* Misc other bugfixes;