Revert "provide a single GASPI_VERSION hex number"

This reverts commit 9b608839968a9a37ec9880c73c3018c010200ab9.
Revert "do not #define GASPI_VERSION, use definition inline"

This reverts commit f54f30e012facd8659fc064693eb48b17f9112e5.
Merge pull request #15 from mrahn/next

Revert f0b88ac21c7ec4bb5a513027df04a2f3775dbdbb