Looks like the new static props in TF2 now use 10 as version number. Use the struct for everything larger than 6 now.

Fixes #11
Use DecimalFormat again to avoid default values with trailing zeros that are interpeted as non-default values in Hammer
Updated/fixed prop_static support for newer TF2 maps using information from the updated Source SDK 2013 repo
Use it for larger versions only, since background01.bsp still uses 5
Updated version