v0.4 Supported formats

This version introduces support of AMF (export only), providing also on-the-fly compression in a ZIP archive.

Formats	Read	Write
AMF uncompressed	✗	✔
AMF zip	✗	✔
AMF zip64	✗	✔
STL ascii	✔	✔
STL binary(little-endian)	✔	✔
STL binary(big-endian)	✔	✔