increase required Postgres version to 9.2

docs/DEVELOPER-ADVANCED.md

@@ -82,11 +82,11 @@ Vagrant version 1.1.2. With this Vagrantfile:
     echo "gem: --no-document" >> /etc/gemrc
     su - vagrant -c "echo 'gem: --no-document' >> ~/.gemrc"
 
-## Postgres 9.1
+## Postgres 9.2
 
 Configure so that the vagrant user doesn't need to provide username and password.
 
-    apt-get -yqq install postgresql postgresql-contrib-9.1 libpq-dev postgresql-server-dev-9.1
+    apt-get -yqq install postgresql postgresql-contrib-9.3 libpq-dev postgresql-server-dev-9.3
     su - postgres
     createuser --createdb --superuser -Upostgres vagrant
     psql -c "ALTER USER vagrant WITH PASSWORD 'password';"

docs/INSTALL.md

@@ -20,7 +20,7 @@ Hosting Rails applications is complicated. Even if you already have Postgres, Re
 
 ### Software Requirements
 
-- [Postgres 9.1+](http://www.postgresql.org/download/)
+- [Postgres 9.2+](http://www.postgresql.org/download/)
 - [Redis 2.6+](http://redis.io/download)
 - [Ruby 2.0+](http://www.ruby-lang.org/en/downloads/) (we recommend 2.0.0-p353 or higher)
 

docs/TROUBLESHOOTING-prod.md

@@ -12,7 +12,7 @@ something like:
     `ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-linux]`
 
 
-1. Are you on Postgres 9.1 or later with HSTORE enabled?
+1. Are you on Postgres 9.2 or later with HSTORE enabled?
 
    You can check your postgres version by typing `psql --version`. To see if
 hstore is installed, open a session to postgres and type `\dx` and see if

docs/TROUBLESHOOTING.md

@@ -10,7 +10,7 @@ reaching out to the community for help:
    `ruby -v` and checking the response.
 
 
-2. Are you on Postgres 9.1 or later with HSTORE enabled?
+2. Are you on Postgres 9.2 or later with HSTORE enabled?
 
    You can check your postgres version by typing `psql --version`. To see if hstore is
    installed, open a session to postgres and type `\dx` and see if hstore is listed.