Add Attr based access

[rodfersou]

https://code.activestate.com/recipes/578644-wrist-friendly-dictionary/

class easyaccessdict(dict):
    def __getattr__(self, name):
        return self[name]
    def __setattr__(self, name, value):
        super().__setitem__(name,value)
    def __missing__(self, name):
        super().__setitem__(name, easyaccessdict())
        return super().__getitem__(name)

>>> d= easyaccessdict()
>>> d
{}
>>> d.foo.bar= 'a'
>>> d
{'foo':{'bar':'a'}}
>>> d['foo']
{'bar':'a'}
>>> d['foo'].blah= 7
>>> d
{'foo':{'bar':'a', 'blah':7}}
>>> d.a.b.c.e.e.f.g.h= 11

Also I have a use case where would be good to accept the dot syntax in the dict:

>>> from path_dict import PathDict
>>> d = PathDict({})
>>> d['a.b.c.d'] = 2
>>> print(dict(d))
{'a.b.c.d': 2}

This is my current workaround:

>>> from path_dict import PathDict
>>> d = PathDict({})
>>> d[*'a.b.c.d'.split('.')] = 2
>>> print(dict(d))
{'a': {'b': {'c': {'d': 2}}}}

A small change here would fix the issue:

before:

	def __getitem__(self, path):
		at = self.at(*path) if isinstance(path, tuple) else self.at(path)
		if isinstance(at, MultiPathDict):
			return at.gather()
		res = at.get()
		self.at_root()
		return res

after:

	def __getitem__(self, path):
                if isinstance(path, str):
                    path = path.split('.')
		at = self.at(*path) if isinstance(path, tuple) else self.at(path)
		if isinstance(at, MultiPathDict):
			return at.gather()
		res = at.get()
		self.at_root()
		return res

same goes to __set__