i124313 At SVG import, try to optimize used CLipRegions
#124468# merge from aoo410 branch, add checks for the read numbers of column for a section
#124453# merge from aoo410 branch, check if the resulting polygon has already exceeded the number of points (2^16) that can be handled by a tools polygon
#124467# merge from aoo410 branch, add check for image data offset against stream length, some further checks
124451: WW8 import: apply correct index entry template patterns which are used for e.g. TOC
#124461# merge from aoo410 branch, add checks for nested depth and entry indices
#i124421# use OSL_ debug helpers instead of tools DBG_ stuff