README.fb

* How to compile using fbcode and jemalloc
  source fbcode.sh
  make 

* Compiling for CPUs with SSE4 support

  make OPT='-O2 -DNDEBUG -msse -msse4.2'
  
  This makes CRC computation much faster, but
  binaries won't run on CPUs that don't support it.

* Latest release is 1.5.3.fb