Improve build process

[ronyeh]

Generate .d.ts files (tsconfig.json setting).

Generate a vexflow.module.js file (that ends in export default Vex;).

Add flow-headless-browser.html to allow the qunit grunt task to run a streamlined vexflow-tests.js. The full flow.html will include things like async loading of web fonts, etc. The command line tests will not preload web fonts.

Gruntfile improvements to allow for dynamic font loading.

Delete jQuery file. Update glyphs.html to not require jQuery.

The output JS files are now as follows:

vexflow.js                <-- the production library with all fonts
vexflow.module.js         <-- same as above, but with export default Vex; at the bottom.
vexflow-debug.js          <-- non-minimized version of vexflow.js
vexflow-tests.js          <-- includes vexflow-debug.js, and all the test cases.

vexflow-core.js           <-- slim version of vexflow without any music fonts. It will dynamically load the font libraries below...
vexflow-font-bravura.js
vexflow-font-custom.js
vexflow-font-gonville.js
vexflow-font-petaluma.js

This was extracted out of the mega Font PR #1163

[ronyeh]

There's one thing I'd like your feedback on. I shortened the names of the output JS files in this PR. Is everyone okay with removing the "-min" from the minified files? Our files are all minified, except for *-debug.js and *-tests.js.

vexflow-full-min.js               => vexflow.js

vexflow-core-min.js               => vexflow-core.js
vexflow-font-bravura-min.js       => vexflow-font-bravura.js
vexflow-font-custom-min.js        => vexflow-font-custom.js
vexflow-font-gonville-min.js      => vexflow-font-gonville.js
vexflow-font-petaluma-min.js      => vexflow-font-petaluma.js
                                  => vexflow.module.js // a new file
vexflow-debug.js // unchanged
vexflow-tests.js // unchanged

Tone.js also does this. For example, this is minified: https://unpkg.com/tone/build/Tone.js

[0xfe]

The filename renaming is fine with me -- it does make more sense since min is the default.

Also, glad to be rid of jQuery.

[0xfe]

Change looks good. One conflict after all those merges to fix :-) LMK when this is good to go.

[ronyeh]

Fixed conflicts. Good to go.

Once this is merged, I'll rebase my Font PR to see where we're at. :-) The remaining Font related changes cut across much of the VexFlow code base, so I'll try to figure out the best way for you to review (perhaps by writing a "how to review" document, haha). Or maybe I can extract one more PR.

I've been working with Rodrigo to iron out any last migration issues with my Fonts branch. We're down to a single (albeit tricky) issue.

[0xfe]

Thanks Ron. Merging.