Add ceedling project for Image Compressor.
Implement IDCT.
Testing cosine function in math.h with few angles.
Add travis.yml.
Change include <math.h> to IDCT.c.
Add clobber.
Done IDCT.
Integrate DCT and IDCT.
Insert math.h into project.yml.
Merge pull request #1 from KyOChiang/master

pull IT