Initial import

The libit project has been transfered to sourceforge. It's still under heavy development.

It currently adds the following basic types: vectors, matrices, univariate functions, complexs.
These channel coding tools are provided: rate k/n convolutional codes, bsc and awgn channel, bspk modulation
These source coding tools are provided: variable length codes, scalar/uniform/trellis-coded quantization
These signal processing tools are provided: 1D and separable 2D lifted 5/3 and 9/7 wavelet
It can also read/write pgm images and wav sounds.

Vivien.