Update to version 0.16.0

Version 0.16.0 has been released. Lots of little changes. The changes to the battle system will be posted on github in the next few days.

Added: 

- Villain name input now has a confirm button, for those who don't want to use the keyboard.

- Two more robots can be unlocked.

- More hero party members are available. Party members 2, 3, and 4 will now vary depending on your choices.

- More battle skills can be unlocked.

- Player starts with 6 battle action slots instead of 3. Select screen will warn the player if they have incomplete Rules.

- Sound effects and improved music for the battle. 

Changed: 

- Rewrote large parts of the battle system in order to: use SP consistently, add status effects, improve how curses work, make it easier to add new content

- Changed the sprites for the HP and SP bars

- Rewrote one of the forge armour options and how they affect conversation before the final battle

Fixed: 

- Some grammatical errors and typos

- Time was always deducted for master plan and hero lover, even at level 3