Move compileOnSave into tsconfig.json

[basarat]

• Reference : Add no-compile option to tsconfig microsoft/TypeScript#2326 (comment) Document here : https://github.com/TypeStrong/atom-typescript/blob/master/docs/tsconfig.md
• Remove example from here : https://github.com/TypeStrong/atom-typescript/blob/master/docs/packages.md#manage-your-projects
• Document as a breaking change here : https://github.com/TypeStrong/atom-typescript/blob/master/docs/CHANGELOG.md