In `psrand.h` it attempts to undefine RAND_MAX and then redefine it.
This may work on some compilers but G++/Clang. To resolve this error
RAND_MAX was renamed to D3_RAND_MAX but **only** in files that
included `psrand.h`. The code behavior should restored to that of the
official release.
Join the license header with historical comments using a separator so IDEs can correctly parse the initial header.
Also use .gitattributes to ensure all files are LF.
