Encode text using encodeURIComponent()

Please try `text="git + hub = github"`
Expected:
---------
![](http://i.gyazo.com/10998bf168de8607e1234c92907777a9.png)

Got:
---------
![](http://i.gyazo.com/b9ce829a1fac9c945d0aa16c68054db2.png)
I would rather not change construction of ```<template>```, but couldn't do it well.


By the way, I would suggest separating `type='follow'` as ```<twitter-follow>``` from the others.
If you like it, you can simplify``` <template>``` and be easy to maintain.