Javascript Support Files for X3DOM Visualization within Dolfin repository

[plscott]

Need to determine a place to hold the support files (.js and .css) used for x3dom visualization. Currently hosted on https://github.com/plscott and accessed through the browser using 'rawgit'. Would be preferable to hold the support files within the dolfin repository and access them from the bitbucket repo. Ideally, could then reference the support files statically allowing for visualization without access to the internet (browser currently accesses raw support files on execution). The problem with this is determining the path to the support files from where the user directory. This problem is not currently present when accessed the raw files are accessed using 'rawgit'.