transpositions; data corrections; added images to ECO tree

This micro revision fixes some data bugs in ECO data. Adds Transitions list for those variations whose move sequences are incompatible with the current opening sequence, yet is at a position that is compatible with the current opening variation (see the About tab for an example). Board positions are now displayed in ECO tree (under Visualizations tab).

New visualizations; bug fixes; cosmetic enhancements

This release adds new visualizations and fixes some bugs in same. It is possible to navigate PGN games when imported. The Shredder external info option has been reinstated. Code cleanup. The About page has been updated.

PGN enhancements; Shredder option is back; cosmetic changes

Re-introduced Shredder data option; PGN navigation controls on PGN Analyze page; various cosmetic cleanups, including tab displays.

Added visualizations, plus minor changes

This version adds some experimental visualizations for playing around with.

Open source client; see README.md

This is an open-source release of the Fenster client. Please view the README.md and src/About page.js files