v1.0.1 is now released!

This update adds several helper functions, improves general consistency of returned values, and overhauls the demo to avoid clashes if importing the resources from it directly.

• Added functions: file_find_attributes, file_find_size, file_get_size.
• Documentation is now available online and included with the asset (see GMZ).
• Most functions now return strictly true/false; full error code is stored in nsfs_status (see doc).
• Fixed buffer_load_ns returning -1 for valid-but-empty files.
• The demo no longer uses overly generic resource names.