Revert "Added IKTYPE_TRANSFORM_6D definition to solve issue #5"

This reverts commit 041a914db4a6a063749c6b65946061fc6692166e. As
explained in the issue #5 comments, the #define should be inserted into
the generated code (either by the generator script or manually), *not*
set to one arbitrary value for all users. That would silently break the
generated code for all others.
use GetIkType() instead of #defines

This removes the need to manually specify the IK type using `#define
IKTYPE_...` and closes #5.
Merge pull request #13 from mintar/use_getiktype

use GetIkType() instead of #defines