Move internal search to Fuse.js

[martignoni]

From @martignoni on April 10, 2018 9:42

References:

• Fuse.js: http://fusejs.io and https://github.com/krisk/fuse/
• Hugo search with Fuse.js in Hugo Resume Theme

Copied from original issue: #15

[martignoni]

See also: implementation in Hugo theme After Dark.