MD5, Config file

-Properties like "server port", "max client", and "chunk" size are now
stored in "config.ini"
-Server now includes MD5 info when sending <GET> response to client
-MD5 functionality can now be invoke with "computeMD5(filename)".
--Function defined in "compute_md5.h"
--must "free()" char* in calling function. See line 357 of "server.c"
-TODO: mutex's