.aliases: Add week

Thanks to @sindresorhus: https://twitter.com/sindresorhus/status/312206490880589824

.aliases

@@ -44,7 +44,10 @@ export LS_COLORS='no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:do=01;35:bd=40
 alias sudo='sudo '
 
 # Gzip-enabled `curl`
-alias gurl="curl --compressed"
+alias gurl='curl --compressed'
+
+# Get week number
+alias week='date +%V'
 
 # Get OS X Software Updates, and update installed Ruby gems, Homebrew, npm, and their installed packages
 alias update='sudo softwareupdate -i -a; brew update; brew upgrade; brew cleanup; npm update npm -g; npm update -g; sudo gem update'