Add docker-env alias to set docker-machine environment variables

bash/aliases

@@ -44,6 +44,8 @@ alias dash-v1='cd ~/code/insight-platform && ~/src/grails-1.2.2/bin/grails run-a
 # http://davidwalsh.name/fixing-vagrant-errors
 alias fix-vagrant='sudo /Library/StartupItems/VirtualBox/VirtualBox restart'
 
+alias docker-env='eval $(docker-machine env default)'
+
 # Some common aliases
 alias ll='ls -alF'
 alias df='df -h'