Nova v0.7 WIP

Hi guys, It has been a long time with no update.

I've been working on Nova v0.7 for a long time, lots of things have been changed, the following is a list:

1. Redesigned the architecture of CDBLOCK.

2. CD Drive emulation is more accurate and its behaviors are more close to the original hardware.

3. Rewrote the CD image parser, supported totally 12 CD image formats including CHD.

4. Supported new executable format .SRE(Motorora SREC) for game developers, and improve other 4 executable formats already supported.

5. Improve CLI, add more startup options, Nova will be more useful to  game developers.

6. Fixed various bugs including long existed bug of memory leaks.

I can't give a definite date when the v0.7 comes out, but since I have to stay home currently just like the most of the people all over the world, so it couldn't be too long.

Stay safe and have a wonderful day :)