Renaming to frees-rpc. Moves examples to its own repository

[juanpedromoreno]

Fixes #39 .
Also, this PR is related to #34 .

All examples have been moved to https://github.com/frees-io/freestyle-rpc-examples for the sake of simplicity.

[codecov-io]

Codecov Report

Merging #40 into master will decrease coverage by 7.94%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
- Coverage   18.77%   10.83%   -7.95%     
==========================================
  Files          20       20              
  Lines         277      277              
  Branches        0        1       +1     
==========================================
- Hits           52       30      -22     
- Misses        225      247      +22

Impacted Files	Coverage Δ
rpc/src/main/scala/proto/annotations.scala	0% <0%> (-100%)	⬇️
rpc/src/main/scala/internal/service/service.scala	0% <0%> (-70%)	⬇️

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