Dependencies are too aggressive for version.h

Apparently qmake can't tell that #include "version.h" and #include
"libdivecomputer/version.h" are not the same thing. Instead of spending
another bunch of hours on fixing the buildsystem I decided to just cleanup
the spots where we actually use the version file and rename it to
ssrf-version.h.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>