UPDATES

+ Change comment notification counter from session-based into
file-based.
+ Create some separated post editor element. Make it possible to be
replaced by a plugin. Anyone ever think about WYSIWYG editor? For
Markdown? Me too...
+ Make the `File` class to be able to set file permission during saving.
`setPermission()` method also added. Usage:
`File::open('path/to/file.txt')->setPermission(0600);` and
`File::write('test')->saveTo('path/to/file.txt', 0600);` or
`File::open('path/to/file.txt')->write('test')->save(0600)`.