* normal computation


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Made snapshot function scriptable. Added function signature that allows the specification of user-defined snapshoit dimensions.

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Corrected behaviour of viewer snapshot function. It is now possible to specify snapshot sizes up to 8192x8192 independently from the glwidget. Additionally a "keep aspect ratio" check box has been added.

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Added buttons to collapse and expand all

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Added checkbox to let user decide whether to test each face's manifoldness when loading (note: this adds additional complexity to the loading process and might cause performance loss when loading meshes with high face valence and high number of faces). Complexity: O(m*n*log(n)), m = # of faces, n = face valence.

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In order to load ALL mesh files (also those that contain non-manifold configurations), we have to check for degenerate faces before adding them. If this is not done, OpenFlipper crashes when adding these faces.

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