add config command for toggling update checker (#589)

* add odo utils config command for enable/disable parameters

- add config command
- create a new field 'config' in odoconfig file
  for storing odo specific configurations

* update CLI structure in Readme.md

README.md

@@ -119,7 +119,6 @@ $ curl nodejs-myproject.192.168.42.147.nip.io
 Multiple component types are currently supported, like nodejs, perl, php, python, ruby, etc.
 
 ## CLI Structure
-
 ```sh
 odo --verbose : Odo (Openshift Do)
     app --short : Perform application operations
@@ -166,10 +165,14 @@ odo --verbose : Odo (Openshift Do)
         create --application --component --port : Create a URL for a component
         delete --component --force : Delete a URL
         list --application --component : List URLs
-    utils : Utilities for completion and terminal commands
+    utils : Utilities for completion, terminal commands and modifying Odo configurations
         completion : Output shell completion code
+        config : Modifies configuration settings
+            set : Set a value in odo config file
+            view : View current configuration values
         terminal : Add Odo terminal support to your development environment
     version : Print the client version information
     watch : Watch for changes, update component on change
-```
+
 *_autogenerated_
+