Replace HTML entities in LICENSE with Unicode characters

See the following commit at IQAndreas/markdown-licenses:

https://github.com/IQAndreas/markdown-licenses/commit/b3df1ba186dacdfec308087100af264f3d0b2873#diff-d41d8cd98f00b204e9800998ecf8427e
Move Bash scripts to the `_scripts` subdirectory
Add 'create-minimal-template' script

I used to do this manually. Now I'm an efficient badass instead.