In order to make the license that applies to each file as clear as possible, and to be consistent with elasticsearch, we are adding Apache 2.0 license headers to the top of each file.
Existence of this header is enforced by eslint and tslint and missing headers were automatically added in the last commit by running:
```
node scripts/eslint --fix && node scripts/tslint --fix
```
* feat(12976): node version validation at runtime.
* refact(12976): move the code into a static utilities class.
* test(12976): added first test case using jest.
* test(12976): added test cases for node_version.
* feat(12976): create setup env node to bootstrap babel, ts-node and node version validator.
* refact(12976): migrated node version code from es6 to es5.
* feat(12976): node version validation at runtime.
* refact(12976): move the code into a static utilities class.
* test(12976): added first test case using jest.
* test(12976): added test cases for node_version.
* feat(12976): create setup env node to bootstrap babel, ts-node and node version validator.
* refact(12976): migrated node version code from es6 to es5.
* fix(12976): remove one level from ts node register cache directory link.
* chore(12976): added caret to semver dependecy in order to support minor versions.
* refact(12976): small change from named import to default import on node version validator.
* refact(12976): removed ts_node_register and add the code to babel_register.
* feat(12976): split eslint config in order to properly support files built to run before and after node version validator. refact(12976): convert script files to es5 code. refact(12976): delete inline eslint configs from node version check related files.
* refact(12976): remove ts node register file.
* refact(12976): completely port setup_node_env to es5.
* refact(12976): remove babel_register invokation from external dependencies in scripts.
* refact(12976): move node_version code directly into node_version_validator inside setup_node_env folder.
* refact(12976): only node version validator for kbn script.
* [babel] create babel-preset and babel-register modules
* [babel-preset] add comments to babel-preset-env.target choices
* [babel-preset] use more normal BUILT_WITH_BABEL signal
* [babel-register] extended comment about filtering ./src in dist
* [babel-preset] stage of class properties has changed, sorta
* [functional_test_runner] replace functional testing tools with custom/pluggable solution
* [functional_test_runner] Convert unit tests to commonjs format
* [functional_test_runner] Fix dashboard test in wrong mode
* [functional_test_runner] Add dashboardLandingPage test subject
* [functional_test_runner] Get Visualize page object
* [functional_test_runner] Fix outdated references
* [functional_test_runner] Fix more outdated refs
* [functional_test_runner] Remove duplicate tests
* [functional_test_runner] Improve test readability
* [functional_test_runner] 😞 So many duplicate methods
* [functional_test_runner] Move mgmt `before` outside toplevel describe
* [functional_test_runner] Settings page obj missing methods
* [functional_test_runner] Add improvements from @gammon
* [functional_test_runner] Fix return statements in async funcs
* [functional_test_runner] Move before() to correct scope
* [functional_test_runner] Add after() hooks to remove index patterns
* [functional_test_runner] Attempt to fix vertical bar chart tests
* [functional_test_runner] Clean up
* [functional_test_runner] Reinstate unit tests
* [functional_test_runner] Set default loglevel back to info
* [functional_test_runner] Replace `context`s with `describe`s
* [functional_test_runner] Better error handling
* [functional_test_runner] Add in new Tile Map tests
* Incorporate changes from master
* [functional_test_runner] validate that every test file has a single top-level suite
* Update contributing doc with link to full doc
* [docs] Spelling and grammar fixes
* docs: writing and running functional tests
* [docs] Move plugin doc to plugin area
* [docs] Housekeeping. Doc in wrong place
* [docs] Remove dup doc file
* [grunt] Only run mocha_setup when running tests, not every grunt task
