Added vertex object editing dialog

the header is now also saved

Added a new tool for clamping vertices

removed the old Add History Line tool

Part history can now be edited

Added basic header editing

Fixed crashing

add comments

Header parsing complete, moved all parsing code into a new class. Documents are now all loaded in one go.

begin work on document loading rework

added a document header structure

added signal emissions

moved emit calls

added an MVC interface to the primitives tree

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mercurial