create new script to check if the current installed version is the latest version

[bradleya]

create new script to check if the current installed version is the latest version

[BradleyA]

In the late night I close this issue, reopening because it is not finished

[BradleyA]

Notes for README page update

   $ ./markcheck markit

./markcheck 78 [INFO]:  Checking GitHub for markit repository release information

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                             Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  8917  100  8917    0     0   6603      0  0:00:01  0:00:01 --:--:-- 29922

./markcheck 89 [INFO]:  /usr/local/bin/markit release 3.24.165

./markcheck 90 [INFO]:  markit repository release 3.41.182, commit date 2018-08-04_22:33:08_CDT