Bmax part 3

Up to now, we have some basic required funtions for the app. It is time to give it another essential feature, we will implement the main flowchart. To do that, we will use the one we did here.

To implement the flowchart, we need to decide a few things:

 - How are we going to get the user input?
   The user will write what he wants to do.

 - Where will the main menu go? after or before chooseLang?
   Better chooseLang right away the app init, and then main menu with option to changeLang again.

 - Which text are going to show on the selections screen?

 - Some flow decissions, that are made on the flowchart, will be explain directly on the code.
   [This should be writen in the draft with the flowchart on more official documents.]



Note 1: To make things easier, the selection menus will only have the default english ime. However we will try to make the sentences short and globally known.

Note 2: After making these selection menus, we can delete previous functions on main, and leave only these two new ones. With this, in theory, we won't have to modify main.c file again.

Note 3: To implement this, we will use one loop in each decission triangle. This will be BMAX's main loop, from there it executes other modules, or it just wait the user input.