compute time in micro seconds not in nano seconds
b64_ntop should return ssize_t
Merge pull request #97 from jeromelebel/nano_seconds_problem

compute time in micro seconds not in nano seconds
no need for casting
Merge pull request #99 from jeromelebel/b64_ntop_return_ssize_t

b64_ntop should return ssize_t
Merge branch 'mongodb-master'