0.5.0

Important notes for users:

• This library is now licensed under the AGPL 3.0 (or later) license
• cht::SegmentedHashMap has been removed, and my recommendation is to use cht::HashMap instead
• Please don't use this library, it's only than a fun project for me and I make no guarantees as to its correctness

Pull Requests merged in this version:

• #21
• #22
• #25
• #26
• #27