1.0.9 Fix overwrite sheet contents on sheet change - add "freeze fixed" version

** Please use v1.0.10.**

• v1.0.9 (and previous versions) have a "feature". Changing sheet without saving causes unsaved changes to be lost in memory, but written correctly to disk. This is a bad problem and fixed in v1.0.10, which is recommended
• A bug where changing sheets in the middle of an unfinished previous sheet change can sometimes overwrite one sheet contents with another is fixed.
• Fixed a possible bug where autosave in the middle of switching sheets can corrupt a sheet.
• Added binaries -freeze-fixed which use a non-buggy connection auto-router. The cost is that manual adjustment of connections separately from components is no longer possible, you will need to move components sometimes to stop connections going through components. However, if freezing when moving components is a problem these should be used.