fix env-config.sh

Author: dyadyaJora

shells/env-config.sh bin/env-config.sh

@@ -1,4 +1,7 @@
-# For different .env files in each folders
+# For TRAVIS
+# Copies files with environment variables from .env.sample at .env 
+# for all subfolders where it is exist
+# (can not use --execdir in travis https://github.com/travis-ci/travis-ci/issues/2811)
 
 function pathedit {
   str=$0