Fix for unused result error on chdir("/")
Use bitmonero log for fork errors
Remove irrelevant fork doc
Throw exception on fork error

This should allow the stack to unwind and provide the opportunity to
clean up any external resources.
Added 'print_height' daemon command
'print_status' command
Merge pull request #1 from Neozaru/daemonize

Added two commands
Get rid of magic #define to enable logging
WIP