Initial work on adding documentation, reorganises modules

src/defines.rs

@@ -1,2 +1,8 @@
+/// The type we store a level in. As our implementation is aimed at normal Pokemon behaviour, a u8
+/// is probably enough, as we'd go up to 100. For other users this might however not be enough. This
+/// allows them to easily change it.
 pub type LevelInt = u8;
+
+/// The amount of moves a Pokemon can have at once. This is set to 4, as that is the default in most
+/// current Pokemon generations. A developer should be able to modify this however.
 pub const MAX_MOVES: usize = 4;