Remove outdated and unmaintained README.devel
Remove obsolete files from "stuff", afc can be used easily instead
Remove umaintained and untested Python tools
Rename license file to more generic COPYING
Update README with latest information and project URLs
Update and slightly cleanup copyright headers of public API
Update NEWS with latest changes
Update copyright headers of all source files to match
Move socket and collection functions to a convenience library

This avoids the iproxy tool from relying on undocumented library ABI.
Use -fvisibility=hidden to avoid exporting non-public symbols
win32: Avoid exporting non-public symbols with declspec dllexport
Updated NEWS with latest changes
Bump so version for release