get_current_dir_name not supported on OSX

[rfbird]

get_current_dir_name() is not supported on osx. Would/should something like:

  #define CWD_MAX 1024                                                             
  char cwd[CWD_MAX];                                                               
  getcwd(cwd, CWD_MAX);                                                            
  printf("KokkosP: Kernel timing written to %s/%s \n", cwd, fileOutput);  

Be prefered for kp_kernel_timer.cpp?

(As an aside, it would be nice if there was an option to write the file in plain text to avoid the need for kp_reader for an easier work flow on simple projects..)

[vlkale]

Possibly associated with #72

[dalg24]

Fixed in #57