Update icons to material design

[cstiens]

Here's the list of those that need to be streamlined. We can use the material design font library instead of font awesome.

• Add friends screen (sms and camera; share should be the iOS icon)
• Me tab (eye and change password)
• chat input (add media and microphone)

This is in an effort to achieve parity among iOS and Android. We've realized the importance of this in writing the FAQ zombot script.

[cstiens]

@N-Pex let me know if you have any questions about this one. It affects the instructions we're giving in the zomkyi script, so I've made it high priority.

[N-Pex]

Almost done, need some more info on colors.