Made some refactoring.
Rewriting easy_getopt method in low level. 3/4 types are managed (Char*,
Int, Long).
Adding lines in sample to test this last adding.
Adding sample with unit tests.
Updating makefile.
Changing way to get infos, now one method per type (long, double,
char*).
Splitting constantes of CURLEINFO in three parts, as get infos methods.
Updating download and get as well