0.4 - LibRetro dat added

• Added LibRetro .dat format parsing for future data.
• Currently only added extra NES data as a test.

Windows Instructions
Download and run the EXE.

MacOS Instructions (untested)
Run TwilightBoxart.CLI using:
chmod +x TwilightBoxart.CLI
./TwilightBoxart.CLI
The MacOS version is huge because the .net framework is included.