This is the first release for RT-Thread v2.1.0 series, which is an alpha technical preview version. As the planning in the road map, this release mainly includes following:

1. Implementation a lwIP interface under DFS file system, therefore, application can use read/write interface on lwip socket. A draft version of select() function has been implemented, but it's only for lwIP, no device file descriptor yet.
2. Add more BSP, for example TM4C129x, AlphaScale ASM9260T and nRF51822 BLE SoC.
3. The CloudIDE has been enable on http://lab.rt-thread.org/cloudide. More packages will be released in this CloudIDE.