Added ``Zepto\FileLoader\PluginLoader`` and related test class
Updated ``Zepto\PluginInterface``, removed unnecessary hook
Added ``ExamplePlugin`` to show how to use ``Zepto\PluginInterface``
Added an option to config.php to enable/disable plugins
``Zepto\FileLoader\PluginLoader`` now returns an array of plugin names and instances.
Removed pico_plugin.php
Added OtherExamplePlugin.php
Fixed broken directory scanning for plugin files
Cleaned up ``Zepto\FileLoader\PluginLoader`` and test class
Changed method signature of ``Zepto\PluginInterface::after_file_load()``
Renamed option ``plugin_dir`` to ``plugins_dir``
Added ``Zepto\FileLoader\PluginLoader`` to main app
Added ``after_file_load`` hook
Updated project version. Seriously, why didn’t I update this earlier?
Cleaned up TODO.md
Merge branch 'develop' into feature/add-hooks
Changed method signature of ``Zepto\PluginInterface::before_file_load()``
Added hooks to ``Zepto\Zepto``
Merge branch 'feature/add-hooks' into develop