YAMLParser now supports YAML lists not parsed by the parser itself.

This means that list of type
```yaml
list:
  - test: "Hello"
  - test: "Hi"
```
will be parsed as a list of (ConfigurationSection)[src/main/java/it/fulminazzo/yamlparser/configuration/ConfigurationSection].
Totally reworked classes separation to respect packaging conventions.
Reworked FileConfiguration#addParsers method.
Renamed `it.fulminazzo.yamlparser.configurations` package to `it.fulminazzo.yamlparser.configuration`.
Made FileConfiguration and ConfigurationSection final.
Added support for escaped dot characters: now it will be able to use `\.` in paths to allow for dotted strings to be parsed.
Added support for BigDecimal notation when getting Number types.
Added `unquote` method to remove quoted strings when saving or loading.
Now IConfiguration extends Serializable.
Fixed dotted test error.
Updated README.md
Updated FulmiCollection

src/main/java/it/fulminazzo/yamlparser/configuration/IConfiguration.java

@@ -993,6 +993,13 @@ default String getCurrentPath() {
         return path.toString();
     }
 
+    /**
+     * Throw exception.
+     *
+     * @param path   the path
+     * @param object the object
+     * @param e      the e
+     */
     default void throwException(String path, Object object, Throwable e) {
         if (e instanceof RuntimeException || e instanceof InvocationTargetException) e = e.getCause();
         path = path == null ? "null" : path;
@@ -1127,7 +1134,13 @@ else if (v instanceof List) {
         return treeMap;
     }
 
-    static String unquote(String string) {
+    /**
+     * Removes any quote from the given string.
+     *
+     * @param string the string
+     * @return the string
+     */
+    static String unquote(@Nullable String string) {
         if (string == null) return null;
         while (string.length() > 2 && string.startsWith("\"") && string.endsWith("\""))
             string = string.substring(1, string.length() - 1);