Some Changes for Linux

Rename macro function encode() as Encode() in file gpudt.h and main.cu.
The Encoding of the following file is changed to UTF-8: main.cu, cudaConstraint.cu, cudaMissing.cu, cudaVoronoi.cu.
Visualisation functions has been suspended.
Mild changes on #Include in main.cu.
Mild changes on #Include in kernel.h.

Compile

CMakeList.txt is added.

mkdir build
cd build
cmake ..
make