Implementation of the coding challenge at https://github.com/gem-spaas/powerplant-coding-challenge

Aurelien 76b1e96fee Add gitignore and implement (naive) production plan function.		%!s(int64=5) %!d(string=hai) anos
cmd	856c6de176 Initial functional API skeleton generated by go-swagger.	%!s(int64=5) %!d(string=hai) anos
models	856c6de176 Initial functional API skeleton generated by go-swagger.	%!s(int64=5) %!d(string=hai) anos
restapi	00d4bd42ca Configure ProductionPlan endpoint and handle computation in	%!s(int64=5) %!d(string=hai) anos
spoptim	76b1e96fee Add gitignore and implement (naive) production plan function.	%!s(int64=5) %!d(string=hai) anos
.gitignore	76b1e96fee Add gitignore and implement (naive) production plan function.	%!s(int64=5) %!d(string=hai) anos
swagger.yml	856c6de176 Initial functional API skeleton generated by go-swagger.	%!s(int64=5) %!d(string=hai) anos