Chipotle continues to reward long-term investors.Chipotle Mexican Grill (CMG 1.56%) has been one of the most reliable growth stocks on the market since its IPO in 2006.With the exception of the three-year period when the company's performance was marred by an E. coli outbreak, Chipotle has delivered solid growth year in and year out.The company recently announced a 50-for-1 stock split, rewarding longtime shareholders with an upcoming reset in the stock price as the stock has been more than a 50-bagger sinc ...