Changelog:
Fixes and enhancements in chemtool 1.6.13
- New export option "ASY" for Asymptote files (http://asymptote.sourceforge.net)
- Added support for Unicode symbol characters inserted e.g. by cut-and-paste from LibreOffice
- Fixed build with newer linkers that do not resolve indirect requirements automatically
- Rewritten logic for choosing to include national language support during build
- Fixed crash on startup due to errors in menu icon setup
- Batch mode could crash due to incomplete initialisation of color arrays
- Undo/redo in "move fragment"-mode did not work as intended
- Default extension is now appended to the save filename as needed
- Fixed exporting to files or directories containing spaces in their names
c90df68b61