repository clean up
GitHub reports that the size of the repository is **over 64MB**.

I have not investigated this thoroughly, but I think that we could reduce the size of the repository considerably if we avoided committing binary blobs.

Our primary build artifacts - the font files ( except the SVG font ) are binary blobs. Tracking different versions of these binary blobs is probably what is increasing the size of the repository considerably.

Nevertheless, these are _artifacts_ that should be _released_; that is, these artifacts should not reside in the repository itself. Rather, they should be in the release archives ( tarballs and the like ) that are created as part of a release. Currently, we generate these artifacts only during releases anyway.

Hence, my proposal is to remove the build artifacts from the repository and maintain them as build artifacts in the release assets.

PS : We have not used GitHub's Release feature in the past, so this would mean starting to use it.