Reorder xcode plugin file

plugins/xcode/xcode.plugin.zsh

-#xc function courtesy of http://gist.github.com/subdigital/5420709
+alias xcb='xcodebuild'
+alias xcdd='rm -rf ~/Library/Developer/Xcode/DerivedData/*'
+alias xcp='xcode-select --print-path'
+alias xcsel='sudo xcode-select --switch'
+
+# original author: @subdigital
+# source: http://gist.github.com/subdigital/5420709
 function xc {
   local xcode_proj
   xcode_proj=(*.{xcworkspace,xcodeproj}(N))
@@ -12,12 +18,6 @@ function xc {
   fi
 }
 
-alias xcsel='sudo xcode-select --switch'
-alias xcb='xcodebuild'
-alias xcp='xcode-select --print-path'
-alias xcdd='rm -rf ~/Library/Developer/Xcode/DerivedData/*'
-
-
 # "XCode-SELect by Version" - select Xcode by just version number
 # Uses naming convention:
 #  - different versions of Xcode are named Xcode-<version>.app or stored