SDF Specs version changelog

**Original report ([archived issue](https://osrf-migration.github.io/sdformat-gh-pages/#!/osrf/sdformat/issues/192)) by Anonymous.**

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Hi there,

as a developer of a tool using the sdformat, I try to keep on track of your current changes.
I know, that this is not really an issue for the C++ code (hence the proposal tag), but I have spent some time diving into threads and Q&As to find sort of a changelog for the sdformat *specifications* changelog or git.

On the homepage of the project, I can switch between the different versions fairly easily, however it seems cumbersome to me, to check for the changes between version 1.5 and 1.6 manually.

Thus, my question: Could you point me to the right source or make the changelog availabel on the sdformat homepage?
Thanks in advance and best wishes,
Simon