Get current process infomation for monitor.

Example

``` use crate::proc_monitor;

let p = procmonitor::getinfo(); println!( "cpus: {}, pid: {}, mem toal: {}, mem free: {}, cpu: {:.2}, usr: {:.2}, sys: {:.2}, mem: {:.2}, process cpu: {:.2}, process mem: {:.2}", p.cpucount, p.pid, p.memtotal, p.memfree, p.percentcpu, p.percentcpuuser, p.percentcpusystem, p.percentmem, p.percentcpuprocess, p.percentmem_process ); ```