Add better search options to allow 'triangle' flights #twinflights

Added one-way flights search option #twinflights

Improve UI a lot #twinflights

Fixed a typo in the project description here on wip.co 😂 #twinflights

Released proof-of-concept for #twinflights You can now search flights given a origin and destination and it will recommend 2 other cities for multiple days to explore! It's simple, but plenty more coming 👀