* Fix invalid stream of Visual Studio DynDebug build logs.
* Remove ARM props file (undergeneralized).
* Clean up white space in Visual Studio *.props files.
This macro conflicts with other projects. This results in the inability to
build one DLL that depends on libsodium if the other DLL also uses the
DLL_EXPORT macro to control visibility of library symbols. Since the choice of
name for this macro is arbitrary, use of a library prefix is preferred.
Frank Denis