Compiler version stamp.

libsolidity/Version.h

@@ -23,6 +23,7 @@
 #pragma once
 
 #include <string>
+#include <libdevcore/Common.h>
 
 namespace dev
 {
@@ -32,5 +33,10 @@ namespace solidity
 extern char const* VersionNumber;
 extern std::string const VersionString;
 
+/// @returns a binary form of the version string, where A.B.C-HASH is encoded such that
+/// the first byte is zero, the following three bytes encode A B and C (interpreted as decimals)
+/// and HASH is interpreted as 8 hex digits and encoded into the last four bytes.
+bytes binaryVersion();
+
 }
 }