Add Serialize/Deserialize to fa module

src/fa/linear.rs

@@ -5,6 +5,7 @@ use ndarray::{ArrayView, Array1, Array2};
 use geometry::Space;
 
 
+#[derive(Serialize, Deserialize)]
 pub struct Linear<S: Space, P: Projection<S>> {
     projector: P,
     weights: Array2<f64>,

src/fa/projection/rbf_network.rs

@@ -5,6 +5,7 @@ use geometry::{Span, Space, RegularSpace};
 use geometry::dimensions::{Continuous, Partitioned};
 
 
+#[derive(Serialize, Deserialize)]
 pub struct RBFNetwork {
     mu: Array2<f64>,
     gamma: Array1<f64>,

src/fa/projection/sutton_tc.rs

@@ -15,6 +15,7 @@ extern {
 }
 
 
+#[derive(Serialize, Deserialize)]
 pub struct SuttonTiles {
     n_tilings: i32,
     memory_size: i32,

src/fa/projection/uniform_grid.rs

@@ -4,6 +4,7 @@ use geometry::{Space, RegularSpace};
 use geometry::dimensions::{Dimension, Continuous, Partitioned};
 
 
+#[derive(Serialize, Deserialize)]
 pub struct UniformGrid {
     n_features: usize,
     input_space: RegularSpace<Partitioned>,

src/fa/table.rs

@@ -23,8 +23,8 @@ use std::collections::HashMap;
 ///
 /// assert_eq!(f.evaluate(&(0, 1)), 1.0);
 /// ```
-#[derive(Clone)]
-pub struct Table<K, V>(HashMap<K, V>);
+#[derive(Clone, Serialize, Deserialize)]
+pub struct Table<K: Hash + Eq, V>(HashMap<K, V>);
 
 impl<K: Hash + Eq, V> Table<K, V> {
     pub fn new() -> Self {