* fix included examples and markdown(book)
fixes: #911
* fix footnote pre_init
* more example link updates
* Restore pool example name
* Example: pool: Upgrade to heapless v0.8
* Example: pool: thumbv6 unsupported: wild cfg-if
Experiment with multi-backend example contained in the example
* Example: lm3s6965: Updated cargo.lock
* Book: Use cargo xtask for by-example
* Docs: Contributing: cargo xtask
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Co-authored-by: Henrik Tjäder <henrik@tjaders.com>
