Enhancement of archsysinfo 

I have integrated some modifications to the archsysinfo bash script. 

* Using "lscpu" for processor speed. This command

> cat /proc/cpuinfo

does not always return the processor speed, especially on some arm processors. The following command

> lscpu 

is now part of Arch Linux by default and it returns the correct information

* Using the following command so that the uptime is nicely formatted

> uptime -p

Here is an example of the output with the older version (on my Raspberry Pi)

               +                 OS:  Arch Linux armv6l
               #                 Hostname:  alarmpi
              ###                Kernel Release:  3.12.21-1-ARCH
             #####               Uptime:  11:08:59 (4) 
             ######              Packages:  265
            ; #####;             RAM:  66 MB  / 184 MB
           +##.#####             Processor Type:  ARMv6-compatible processor rev 7 (v6l)
          +##########            Processor Speed:  ARMv6-compatible processor rev 7 (v6l)
         #############;          $EDITOR:  
        ###############+         Root:   /  ()

And the new output (with the correct processor speed and uptime)

               +                 OS:  Arch Linux armv6l
               #                 Hostname:  alarmpi
              ###                Kernel Release:  3.12.21-1-ARCH
             #####               Uptime:   4 days, 3 hours, 7 minutes
             ######              Packages:  265
            ; #####;             RAM:  66 MB  / 184 MB
           +##.#####             Processor Type:  ARMv6-compatible processor rev 7 (v6l)
          +##########            Processor Speed:  700.0000 MHz
         #############;          $EDITOR:  
        ###############+         Root:   /  ()