Added simple example for Redis
+ Added examples for refactor of redis, mogoose, callback-hell.
+ Added array methods replace for .every, .filter, .forEach, .map, .reduce, reduceRight, .some with generatorCallback's
+ Added example for usage "yield [1,2,3].<method>(function*(...){ });"
% In progress: methods for array with generatorFunction: .sort, .find, .findIndex