Fix missing elements in nested xml and compatibility

.gitignore

@@ -1,2 +1,11 @@
 build/
 vendor/
+.settings/
+.buildpath
+.bundle
+.cache
+.DS_Store
+.php_cs.cache
+.php-cs-fixer.cache
+.phpunit.result.cache
+.project

README.md

@@ -4,6 +4,10 @@
 
 ### Change Log:
 
+ - `0.1.13` fixed nested child element parsing (PR #21 on github); fixed
+   deprecation and notices for new php versions; normalized code and docblocks,
+   simplified install.
+
  - `0.1.12` maintenance release with fixes.
 
  - `0.1.11` maintenance release with fixes. added `XMLReader::CDATA` and
@@ -38,15 +42,15 @@
  - `0.0.23` first try of a compatibility layer for PHP installs with a libxml
     version below version 2.6.20.
     functions with compatibility checks are `XMLReaderNode::readOuterXml()`
-   and `XMLReaderNode::readString()`.
+    and `XMLReaderNode::readString()`.
 
  - `0.0.21` moved library into new repository and added
    `XMLReaderAggregate`.
 
  - `0.0.19` added `XMLElementXpathFilter`, a `FilterIterator` for
    `XMLReaderIterator` by an xpath expression.
 
-   ~~~php
+   ```php
    $reader = new XMLReader();
    $reader->open($xmlFile);
    $it = new XMLElementIterator($reader);
@@ -56,15 +60,23 @@
        '//user[@id = "1" or @id = "6"]//message'
    );
 
-   foreach($list as $message) {
+   foreach ($list as $message) {
        echo " * ",  $message->readString(), "\n";
    }
-   ~~~
+   ```
+
+### Usage
+
+It is recommended to use the composer autoloading mechanism.
+
+To use without composer and for backwards compatibility, it is possible just to
+include the file `build/include/xmlreader-iterators.php` in any php project.
+
+Checkout the [`examples`] folder for more examples.
 
 ### Stackoverflow Q&A for the XMLReader Iterators
 
-the latest on top (for more examples, checkout the
-[`examples`] folder):
+The latest Q&A on top:
 
 - [Add Tag Element using XMLReader and SimpleXML or XMLWriter](https://stackoverflow.com/q/69455574/367456)
 - [How to distinguish between empty element and null-size string in DOMDocument?](http://stackoverflow.com/a/24109776/367456)
@@ -73,3 +85,14 @@ the latest on top (for more examples, checkout the
 - [Getting XML Attribute with XMLReader and PHP](http://stackoverflow.com/a/15399491/367456)
 
 [`examples`]: https://github.com/hakre/XMLReaderIterator/tree/master/examples
+
+### Build
+
+To build the single file to use XMLReaderIterator without composer, run:
+
+```php
+composer install
+php -f build.php
+```
+
+The command `sh build.sh` can be used too.