Scale reused geometry correctly

[muren400]

Hi,

this commit deals with the scaling issue discussed here: #1313

This should take care of uniform and non uniform scaling.

[hlg]

How about Scale2 or Scale3 omitted in the non-uniform case? These attributes are optional and would probably lead to to a NullPointerException if undefined. The documentation says: " If the Scale2 or the Scale3 factor is omitted, it defaults to the value of Scale (the x axis scale factor)." Otherwise it looks good.

[muren400]

I added a commit to the branch. Now it defaults to Scale if Scale2 or Scale3 are not set.

[zaqifathis]

I have tested the changes specifically for the non-uniform case with three mapped items using the same mapping
source and the result works as expected with no issues.

here is the test file:
three-mapped-shape-transformation-checkdefault.zip