Refactor Orderlist

[LaraMo]

• [x] Above every function - create proper comments for each function

For getter and setters, no comment is needed, but have the proper naming. Have the following format:

/** 
* This method returns number of ....
*/
void getNumberOfPeople();

• [x] Correct copy constructor, assignment operator, and stream insertion operator

• [x] Make sure new pointer pointers point at proper memory loction

• [x] Make order list a vector

[EyalAzimov]

All done! See Branch order-execution-implementation