Rebuild icudt51l.dat file? What's the best way to rebuild the icudt51l.dat file in /usr/share/icu/? ICU (International Components for Unicode) is a set of C/C++ and Java libraries I think, that seem integral to OS X as built-in apps as well as apps using vital system services refuse to work properly or crash after this file got accidentally deleted. I'm attempting to retrieve it, but as this is on a system drive getting it back might not be possible.
Another solution for this is to boot into your recovery partition with CMD+R while your machine is booting. From there you can open the Terminal from Utilities in the menu bar. Then you can copy the file with:

cp /usr/share/icu/icudt51l.dat /Volumes/YOUR_DRIVE/usr/share/icu


If your drive has FileVault enabled you may have to unlock that through disk utility first.