Further improvements on the DQFlex implementation

git-svn-id: svn://svn.code.sf.net/p/relacs/code/relacs/trunk@1172 1550813e-0d35-0410-aec7-fc86b090456a

Signed-off-by: Jan Grewe <jan.grewe@g-node.org>
Started implementing digital i/o for DAQFlex

git-svn-id: svn://svn.code.sf.net/p/relacs/code/relacs/trunk@1173 1550813e-0d35-0410-aec7-fc86b090456a

Signed-off-by: Jan Grewe <jan.grewe@g-node.org>