Chapter 2: Getting Started

@laurocaetano, @rmascarenhas, @andrielfn and @rcillo After a lot of effort on this chapter I tried my best to solve exercises and problems, but couldn't finish all of them.
my properties are completely superficial. I think that the `i` doesn't exist is not the case, the INSERTION-SORT state over `j` that it is the variable in the loop.

I commented here, which I think that might be a better answer https://github.com/rmascarenhas/ita/pull/2/files#discussion_r15385816