support intranet

[robberphex]

In intranet (the network without internet access), The browser cannot load fonts.googleapis.com resources.

So, use package material-design-icons to load local resources.

[ghost]

All CLA requirements met.

[codecov]

Codecov Report

Merging #159 (1c92ab9) into master (42f5f47) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #159   +/-   ##
=======================================
  Coverage   15.57%   15.57%           
=======================================
  Files           7        7           
  Lines         443      443           
=======================================
  Hits           69       69           
  Misses        368      368           
  Partials        6        6           

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[artursouza]

@robberphex This PR is not working with the latest changes. We are cutting a release now. We will get back to this one afterwards.