hacked fix for Displacement Evaluation

Not pretty but at least it doesn't break your project ...
Stabilized Projection Baking for parts of Falloff Map

- For Fresnel Mode changed ViewCamera to Projection Camera. This fixes
the issue for that mode that the projected Paint is in a different
position than the paint in the buffer.
The two other modes Distance and ShadowLight still have that issue.
Bugfixes
Merge pull request #33 from campi3d/Dev

Merging Bugfixes for 1.21 release