Stream_support: split_binary_stl()

[afabri]

Summary of Changes

Add a function to split large STL files. Very preliminary version.

Release Management

• Affected package(s): Stream_support
• Issue(s) solved (if any):
• Feature/Small Feature (if any): tbd
• Link to compiled documentation (obligatory for small feature) wrong link name to be changed
• License and copyright ownership: LGPL