Merge pull request #58 from pakozm/devel

Solved bug at table.insert
Solved bug at autodiff
Making affine transform to work properly with matrices
Updated AffineTransform2D
Added tostring method in AffineTransform2D
updated image invert method
Minor changes in matrix and image
converted to local a lua function in image_metrics
Added basic GTK function for showing images
Added linspace and logspace
Added variable arguments to gtk.show function in tools.lgi.gtk module
Solved bug at referenced
Generalized memory block as void* reinterpred with type T* depending in the template instantiation.
ImageRGB and matrix shares memory pointer reference
compilation problem solved
Removed compilation warning, and bad defined assert (sanity check) when using 0 in randomize weights
Another compilation problem
Updated with comments
Improved gtk viewer
Added random access iterator in matrix