Relative paths to some fonts in CSS files incorrect

[karlsaintlucy]

Several of the url() references to fonts in .css files point to font files using "...", not "..", and the references fail as a result.

An example:

mdeditor/css/.../fonts/editormd-logo.eot can't be found, because the font file exists at mdeditor/css/../fonts/editormd-logo.eot.

I discovered this when trying to build a Django app to Heroku — I can fix the problem in my local instance, but the Heroku build fails because django-mdeditor gets downloaded with PIP to build the app.

[karlsaintlucy]

I tried to fix this in a pull request.

[pylixm]

Thanks for your contribution.