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After a couple dozen fixes and tweaks to the last beta, it seemed like a good time to put out a new one to keep the bug fixing going steady.
What is the relationship between 1.3.x and 2 Beta x? When 2 goes live I assume 1.3.x will be superseded?
The odd point releases are betas for the next major number so 1.3.x are betas that will become 2.0.0-stable once it's ready. 2.0 will become a stable branch, and new features will be added to 2.1.x, which will become 2.2.0-stable eventually too.