codeception configs, web config modifed for db-settings
new entry points for application
colors added
tests modified, bootstrap added
configs fixed and improved
added testcase for unit tests, bootstrap files improved, tests inherited from base testcase
Added robots.txt to application templates
modified tests according yii2-codeception extension
added new extension yii2-codeception, modified composer settings
Merge PR #1393 branch 'yii2-basic-codeception' of https://github.com/Ragazzo/yii2 into Ragazzo-yii2-basic-codeception

* 'yii2-basic-codeception' of https://github.com/Ragazzo/yii2:
  small typo fix
  added readme, changelog, license and composer files.
  added new extension yii2-codeception, modified composer settings
  modified tests according yii2-codeception extension
  added testcase for unit tests, bootstrap files improved, tests inherited from base testcase
  configs fixed and improved
  tests modified, bootstrap added
  colors added
  new entry points for application
  codeception configs, web config modifed for db-settings

Conflicts:
	composer.json
cleanup and re-aranged codeception tests for basic app

follow up to PR #1393
removed auto generated files from repo
adjusted tests to run on php browser and selenium
finished codeception extension