Remove k command and use dnx instead

build.sh

@@ -31,7 +31,7 @@ if ! type dnvm > /dev/null 2>&1; then
     source packages/KoreBuild/build/dnvm.sh
 fi
 
-if ! type k > /dev/null 2>&1; then
+if ! type dnx > /dev/null 2>&1; then
     dnvm upgrade
 fi
 

samples/SocialSample/Startup.cs

@@ -89,7 +89,7 @@ namespace CookieSample
              netsh http add urlacl url=http://mssecsample.localhost.this:54540/ user=[domain\user]
 
             The sample app can then be run via:
-             k web
+             dnx . web
             */
             app.UseOAuthAuthentication("Microsoft-AccessToken", options =>
             {