* chore(NA): move elastic-datemath into a ts package
* chore(NA): finish elastic-datemath
* chore(NA): finish elastic-datemath
* chore(NA): source folder for elastic-datemath
* chore(NA): add source-maps ace, analytics, apm-config-loader and apm-utils packages
* chore(NA): add sourcemaps to packages on typescript
* chore(NA): move test fixtures within source
* chore(NA): correct exclusions on packages
* chore(NA): correct package.json on all packages
* chore(NA): correct package.json on all packages
* chore(NA): complete kbn pm
* chore(NA): default export on elastic-datemath
* chore(NA): include logs on kbn-logging
* chore(NA): update bundle ref module to last code used in the webpack upstream
* chore(NA): update bundle ref module to last code used in the webpack upstream - refactored
* chore(NA): remove override method for exportsArgument
* fix(NA): typechecking problems by use @internal at javascript import sources on kbn-test package
* fix(NA): typescript projects check
* fix(NA): run optimizer integration tests from source
* chore(NA): fix usage from target for kbn optimizer
* chore(NA): path on tsconfig
* chore(NA): move tsignore into ts-expect-error
* chore(NA): include souce maps on kbn cli dev
* chore(NA): include souce maps on kbn-crypto, kbn-server-http-tools and kbn-telemetry-tools
* chore(NA): add issue links into the ts-expect-error comments
* first shot of the apm configuration loader
* revert changes to kibana config
* remove test files for now
* remove `?.` usages
* use lazy config init to avoid crashing integration test runner
* loader improvements
* add config value override via cli args
* add tests for utils package
* add prod/dev config handling + loader tests
* add tests for config
* address josh's comments
* nit on doc