Attend the TODO statements in FiberTraces.cc

In FiberTraces::extractFromProfile there is a TODO statement:
TODO: change to sqrt(T_A2_VarianceArray)

regarding the lines
{{ ndarray::Array<ImageT, 2, 2> D_A2_ErrArray
= ndarray::allocate(_trace->getImage()->getArray().getShape());
for (int i_row = 0; i_row < _trace->getHeight(); ++i_row){
for (int i_col = 0; i_col < _trace->getWidth(); ++i_col)

{ D_A2_ErrArray[i_row][i_col] = ImageT(sqrt(_trace->getVariance()->getArray()[i_row][i_col])); }

}
}}
Please attend this TODO statement as well as possible other ones (at least file a ticket for all other TODO statements in the code)