Move to apache-avro, some prepare for release.

[gklijs]

Fixes #75

[codecov]

Codecov Report

Merging #80 (b4b6ddd) into master (6e3881f) will increase coverage by 1.96%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##           master      #80      +/-   ##
==========================================
+ Coverage   88.77%   90.73%   +1.96%     
==========================================
  Files          21       21              
  Lines        4097     4122      +25     
==========================================
+ Hits         3637     3740     +103     
+ Misses        460      382      -78     

Impacted Files	Coverage Δ
src/async_impl/avro.rs	92.36% <ø> (+0.15%)	⬆️
src/async_impl/easy_avro.rs	96.87% <ø> (-0.05%)	⬇️
src/avro_common.rs	81.39% <0.00%> (-0.50%)	⬇️
src/blocking/avro.rs	90.84% <ø> (+0.49%)	⬆️
src/lib.rs	100.00% <ø> (ø)
src/async_impl/schema_registry.rs	88.06% <100.00%> (+1.17%)	⬆️
src/proto_raw_common.rs	73.68% <0.00%> (-2.64%)	⬇️
src/error.rs	97.91% <0.00%> (-0.05%)	⬇️
src/blocking/schema_registry.rs	85.38% <0.00%> (ø)
... and 14 more

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[martin-g]

Late LGTM!

[gklijs]

@martin-g thanks.
It's kind of a one man show. Especially with small things like this, if the tests run, it should be fine.