Added enviromental variable tip for debug and deployment
Merge branch 'master' of https://github.com/cakephp/docs into deployment-tip
Removed the tip, slightly reworded, and added an example
Changed enviromental to enviromental
Merge branch 'master' of https://github.com/cakephp/docs into deployment-tip
Default debug level to 0, changed another 'environmental' to 'environment'
Merge pull request #732 from bcrowe/deployment-tip

Added enviromental variable tip for debug and deployment