Merge pull request #2 from makeri89/patch-1

clarify usage instructions a bit

README.md

@@ -47,7 +47,7 @@ Part of the script will add various environment variables to your .bashrc. Norma
 
 Script will install PostgreSQL and your database in to your home directory, and add necessary environment variables in to your .bashrc. Installed configuration will only accept connections from you using unix socket in ~/pgsql/sock directory.
 
-Since lab computers are shared, please do not leave your database running in the background. For your convenience, there is `start-pg.sh` script which will start PostgreSQL in your terminal on the foreground, so you (hopefully) won't forget to stop running your database when you leave computer. Directory with the script should be added to your PATH variable, so you can run it without writing full path.
+Since lab computers are shared, please do not leave your database running in the background. For your convenience, there is `start-pg.sh` script which will start PostgreSQL in your terminal on the foreground, so you (hopefully) won't forget to stop running your database when you leave computer. Directory with the script should be added to your PATH variable, so you can run it without writing full path. After installation, you need to re-open your terminal window or run `source ~/.bashrc` for the command `start-pg.sh` to work.
 
 When you want to stop PostgreSQL, stop it with ctrl-c. Closing terminal will not stop PostgreSQL, only detach it to background. If you do this, you need to stop PostgreSQL manually. For your convenience, oneliner `kill $(ps x|grep pgsql/bin/postgres|grep -v grep|awk '{print $1}')` may work.