While the build process doesn't require any tool since the program is
written as single script directly loadable in browsers, it is
convenient for the developpers to have some of them to improve its
coding experience and avoid them some headaches.

Those tools consists of a linter (ESLint) and a type checker
(TypeScript).  They can be fetched with 'NPM' by running the 'npm
install' command from the the source directory.

To run the linter you can execute:

   $ make lint

To run the type check you can execute:

   $ make check-types

When modifying the 'info.js' source we recommend that you often run
those commands.

Additionaly the NPM install process provides 'modernizr' which can
update the "modernizr.js" script which is used for ensuring the
portability of "info.js" across browsers by doing features tests.  The
update can be done by executing:

   $ make modernizr

Finally 'Uglify-js' (which is provided by NPM too) is used to check
the size of a minified version of the script.  To do that you can
execute:

   $ make minify