Set DEVELOPER build variable to current commande line tools installation
ICU sources updated to 54.1
ICU sources updated to 54.1
Use Xcode 5.1.1 Command Line Tools to build the library
Read me to ICU 54.1
ICU 54.1.1 download URL
Merge pull request #2 from Falzee/master

ICU 54.1 + Developer variable linked to Xcode selected Command Line Tools