Removed boost_serialization from configure.
Removed horrifying program_options troll #include line from admin_command_parser.hpp.
Added options.hpp and option_t type to describe an option.
Added help_line_t and help_section_t.
Added parse_command_line function.
Made option_t use SIZE_MAX for max_appearances since it is a size_t.
Made parse_command_line throw a parse_error_t.
Made ifdef WEBRESDIR in command_line.cc be properly indented.
Decoupled get_web_path, get_local_addresses, and get_service_address_ports from command line parsing.
Implemented parse_host_and_port.
Implemented get_io_backend_option.
Made write_pid_file be decoupled from command line parsing.  Also made it not be broken!
Implemented some options descriptions up to get_config_file_options.
Added new options descriptions for get_web_options and get_network_options.
Implemented new options descriptions up to get_help_options.
Implemented new version of get_rethinkdb_create_options and get_rethinkdb_serve_options.
Implemented new version of get_rethinkdb_proxy_options.
Implemented the new version of get_rethinkdb_admin_options.
Implemented the new get_rethinkdb_import_options.
Implemented the new get_rethinkdb_porcelain_options.