Merge pull request #67 from create/master

Add postgreSQL database

packages/postgres.rb

+require 'package'
+
+class Postgres < Package
+  version '9.3.2'
+  source_url 'https://ftp.postgresql.org/pub/source/v9.3.2/postgresql-9.3.2.tar.bz2'
+  source_sha1 'e1438f6cc8d387703dd1cca201316603266bd83a'
+
+  depends_on 'buildessential'
+ 
+  def self.build
+    system "./configure"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+    out = "#{CREW_DEST_DIR}/usr/local/pgsql/data"
+    system "mkdir", out
+    puts "------------------"
+    puts "Installation success!"
+    puts "To get started, you need to initialize a database directory"
+    puts "'sudo chown chronos:chronos /usr/local/pgsql/data'"
+    puts "'sudo chmod 700 /usr/local/pgsql/data'"
+    puts "'initdb -D /usr/local/pgsql/data'"
+    puts "To run your database: 'pg_ctl -D /usr/local/pgsql/data -l logfile start'"
+    puts "Create a database: 'createdb <dbname>'"
+    puts "Connect to database: 'psql <dbname>'"
+  end
+end