Add AGPL 3.0.
Add LGPL 2.1.
Add LGPL 3.0.
Add CC0 1.0.
Add WTFPL 2.0.
Add Zlib.
Fix indentation on WTFPL.

The whole reason I started working on this project was because that extra space
was bugging the hell out of me.
Merge pull request #17 from xiongchiamiov/add-licenses

Add licenses