fix misleading document (#133)

'docker' is the container, not the directory. Fix #129

README.md

@@ -52,7 +52,8 @@ to load Dreamview UI.
 
 ### Replay demo rosbag
 ```
-# in a different terminal inside docker
+# in a different terminal, in the apollo directory
+bash docker/scripts/dev_into.sh # jump into the docker container
 rosbag play -l ./docs/demo_guide/demo.bag
 ```
 Dreamview should show a running vehicle with trajectory now.

scripts/apollo_base.sh

@@ -79,7 +79,7 @@ function check_agreement() {
      fi
      cat $AGREEMENT_FILE
      tip="Type 'y' or 'Y' to agree to the license agreement above, or type any other key to exit"
-     echo $tip 
+     echo $tip
      read -n 1 user_agreed
      if [ "$user_agreed" == "y" ] || [ "$user_agreed" == "Y" ]; then
          rm -rf $agreement_record