v5.2.1

Main changes of this release version:

• Refactored origin scripts-based build system to CMake-based build system;
• Support Carrier SDK implementation on Windows platform (x86/x64);
• Support carrier group without central administration, and group peers should be required connected to carrier network;
• Support file transfer between two peers with pull-driven and resume from break-point enabled.
• Support for session to have it's own cookie or bundle data;
• Enlarge the data capacity when using API of sending invitation request/reply with data;
• Refactored error codes and added APIs to get error description from error number;
• Add testsuite to verify feature of group and file transfer;
• Add app demo "elafile" demonstrate how we use APIs of file transfers;
• Add command tool "elaerr" to check what error description to specific carrier errno number;
• Upgrade underlying dependency project - toxcore.
• Optimizations and bugfixes to origin carrier/session/stream;
• Support CI for all platforms (Linux/Macos/Windows/Android/iOS)

The last release version of v5.1.

We release the last version of carrier stage-I (v5.1) which could deploy for product usage.

1. Carrier: p2p message framework.
2. Session: p2p session framework (Oriented to stream of transferring data)

Pre alpha release

v5.0.1-pre

Fix printf format string warning