Log Message:
Update to 1.2.0:

Significant changes since 1.1.6:
* You can now specify "-" as the input file, meaning standard input.
* Lots and lots of code reorganization, including changes to the build system.
* scrypt now consults the hw.memsize sysctl on relevant platforms to figure
out how much memory is available.  (This should help on OS X.)
* scrypt now detects and uses AESNI instructions for encryption/decryption.
* scrypt now detects and uses SSE2 instructions automatically (and thus there
is no longer an --enable-sse2 option to the configure script).