Add Chinese Taipei flag

[nathanmenard]

No description provided.

[gr8bit]

@nathanmenard Hi Nathan, thank you for your efforts! This ruby gem is not the place that maintains the flags though - it's just a repackaging (for rails) of this collection:
https://github.com/lipis/flag-icon-css
You might want to submit your flag there, then it will find its way into this gem on the next update (which should happen soon, this gem is a major version behind...).

Cheers!