Provide a native method to retrieve the version number

Two additional checks for lib copying

Makes sure that /vendor/lib is the first entry in LD_LIBRARY_PATH
and that /vendor is on a temporary file system.

Retry copying the native libraries on failure

Should hopefully fix rovo89#22 (or rather work around these issues).

Use numeric versions for the binary

The binary is updated less often than the Java part.
A version string suggests that the version number should be the same
as for the Java part (especially when the strings are similar), but
this is not the case.

The different format should avoid this misunderstanding and also
recompiling the binary just to change the version from "beta"
to "release" etc.

Add compatibility test executable, reset instruction test after patch…

…ing assembler code