Fix delay at the start of the experiment.

[nvbln]

Partially fixes issue #24.
Currently the git history is a bit messy. I wanted to test and fix the error using the new changes on other branches. Once they have been merged I'll clear up the history.

[nvbln]

Rebased on the current master. Still holds the commits from the other branch. This will be fixed before merging.

[nvbln]

After ~420 frames, the following error occurs and the scanning cannot go on:

The application is not able to keep up with the hardware acquisition.
Increasing the buffer size, reading the data more frequently, or specifying a fixed number of samples to read instead of reading all available samples might correct the problem.
Property: DAQmx_Read_RelativeTo
Corresponding Value: DAQmx_Val_CurrReadPos
Property: DAQmx_Read_Offset
Corresponding Value: 0

[nvbln]

After ~420 frames, the following error occurs and the scanning cannot go on:

The application is not able to keep up with the hardware acquisition.
Increasing the buffer size, reading the data more frequently, or specifying a fixed number of samples to read instead of reading all available samples might correct the problem.
Property: DAQmx_Read_RelativeTo
Corresponding Value: DAQmx_Val_CurrReadPos
Property: DAQmx_Read_Offset
Corresponding Value: 0

This issue has been solved now, or at the very least it should be pushed towards ~210 000 planes.