- skins2/utils/bezier.*: Added support for curves made of one point
- skins2/theme/skin.dtd: Removed Event and Rectangle tags - skins2/src/theme.cpp: Destroy curves explicitely - ALL: Anchors can be defined using a Bezier curve, which allows rectilinear anchors (but it is still possible to define anchors reduced to a single point). A "curved anchor" only attracts "single point anchors"
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