refactor: use dedicated namespace and simplify directory hierarchy.
refactor: Visitor → PropertyVisitor
rewrite: automagically figure out if class is a Controller or Helper

The implementation is changed to read in all *.php source files and
automatically figure out the type of the class by resolving it's
parents.
composer: upgrade php-parser and getopt-opt

php-parser: stable release
getopt-php: new feature to set custom banner
add `--remove` flag
Release 0.0.6