feat(codebuild) Added buildspec and cleaned up files.

docs(README) Updated with info about why and some todos

feat(xray) Added integration with twirp hooks for tracing

fix(xray) Sorted out errcheck warning related to lambda.

feat(xray) Added xray support to lambda function

chore(README) Added build status

fix(Makefile) Exclude generated sources.

fix(Makefile) Adjust targets run by ci to include setup

chore(Project) Setup initial project structure.