Add notes about setting up vagrant

vignettes/vagrant-setup.Rmd

@@ -0,0 +1,42 @@
+<!--
+%\VignetteEngine{knitr}
+%\VignetteIndexEntry{Vagrant setup}
+-->
+
+# Vagrant set up
+
+Run this code to set up databases on vagrant vm.
+https://gist.github.com/trestletech/b5babf76487fa6c898b2
+
+```
+# Install needed apt packages
+sudo apt-get install postgresql libpq-dev
+sudo apt-get install mysql-server libmysqlclient-dev
+
+# Set up database users
+sudo su -
+sudo -u postgres createuser --superuser Ruser
+sudo -u postgres psql
+\password Ruser
+# press enter twice
+# Ctrl + D
+
+mysql -u root -p -e "CREATE DATABASE lahman;"
+mysql -u root -p -e "CREATE DATABASE hflights;"
+mysql -u root -p -e "CREATE DATABASE test;"
+
+sudo -u postgres createdb lahman
+sudo -u postgres createdb hflights
+sudo -u postgres createdb test
+# Ctrl + D
+
+R
+install.packages(c("RPostgreSQL", "RMySQL"))
+# Ctrl + D
+
+library(dplyr)
+lahman_mysql()
+lahman_postgres()
+hflights_postgres()
+
+```