Testing changes of sqlectron-core

This is an easy way to test sqlectron-core changes on the GUI project.

Make the GUI project use the core from ../sqlectron-core directory:

# from sqlectron-gui directory
./scripts/link-sqlectron-core.sh

Start the auto compile of sqlectron-core:

# from sqlectron-core directory
npm run watch

Then run the GUI project normally:

# from sqlectron-gui directory
npm run dev