added glyph

src/main/java/markov/Glyph.java

+package markov;
+
+public class Glyph {
+    public enum Type {
+        word, interpunction, control, whitespace
+    }
+
+    private Type type;
+    private String content;
+
+    public Type getType() {
+        return type;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public Glyph(Type type, String content) {
+
+        this.type = type;
+        this.content = content;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Glyph glyph = (Glyph) o;
+
+        if (type != glyph.type) return false;
+        return content != null ? content.equals(glyph.content) : glyph.content == null;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = type != null ? type.hashCode() : 0;
+        result = 31 * result + (content != null ? content.hashCode() : 0);
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Glyph{" +
+                "type=" + type +
+                ", content='" + content + '\'' +
+                '}';
+    }
+}