opraveny status kody, slozeni HTTP requestu, GNUmakefile

 * opraveny chybove navratove statusy z programu: exit(2) status muze byt 0-127!!!
 * HTTP request vice prehlednejsi pomoci string concatenance, TODO: argv[1] do HTTP requestu!!!
 * pridan GNUmakefile
Merge pull request #1 from honz4/master

opraveny status kody, slozeni HTTP requestu, GNUmakefile