_addConfigToRoot(callback) {
		fs.writeFile(this.rootDir+"tsconfig.json", this._getConfigOptionsString(), (err) => {
		  if (err) throw err;
		  this.callTsc(callback);
		});
	}
/*
		writes config .json to root of directory.
	*/
writes config .json to root of directory.
writes config . json to root of directory .
_addConfigToRoot(callback) {
		fs.writeFile(this.rootDir+"tsconfig.json", this._getConfigOptionsString(), (err) => {
		  if (err) throw err;
		  this.callTsc(callback);
		});
	}
_addConfigToRoot ( callback ) { fs . writeFile ( this . rootDir + "tsconfig.json" , this . _getConfigOptionsString ( ) , ( err ) => { if ( err ) throw err ; this . callTsc ( callback ) ; } ) ; }
writes config .json to root of directory.
writes config . json to root of directory .