Add Error handling and new parsing routine
Add Error handling and new parsing routine

Added a RadosError enum for easier try! error handling.
Adding a convienence function to connect to ceph.
Changed the rados_pool parsing routine to use memchr.
Changed the calls to rados_pool_list to take into account
if the pools list is bigger than 500 u8's.

lambdastackio/ceph-rust,lambdastackio/ceph-rust