swtich project to PSR-4
created the ApiRateLimiter filter
improved rateLimiter filter, need to make it a class now
RateLimiting

class RateLimiter allow api rate limiting
UI now reflects limiting
Validator

ColorValidation extracted to a service
Merge pull request #1 from beNjiox/v0.3-backend-improvment

V0.3 backend improvment