rework of layout data utils

...g/fortiss/tooling/base/ui/utils/RectangleLayoutUtils.java

...rc/org/fortiss/tooling/base/ui/utils/SnapToGridUtils.java

...runk/src/org/fortiss/tooling/base/ui/utils/ZoomUtils.java

org.fortiss.tooling.base/trunk/META-INF/MANIFEST.MF

...g/fortiss/tooling/base/layout/DefaultLayoutConstants.java

...c/org/fortiss/tooling/base/layout/LayoutKeyConstants.java

.../trunk/src/org/fortiss/tooling/base/utils/AngleUtils.java

...nk/src/org/fortiss/tooling/base/utils/DimensionUtils.java

...fortiss/tooling/base/utils/LayoutModelElementFactory.java

...rg/fortiss/tooling/base/utils/OffsetOrientationUtils.java

.../trunk/src/org/fortiss/tooling/base/utils/PointUtils.java

...trunk/src/org/fortiss/tooling/base/utils/PointsUtils.java