Roblox-py

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- Continuing to make things more reliable with BeautifulSoup
- Working on fixing deprecated APIs
- Instead of having Asset.limited and Asset.limited_unique, where only one could be true, there is now Asset.limited and
Asset.unique (if Asset.unique is True, so is Asset.limited)
- Asset.RAP()
- Fixed Asset.favorite(), Asset.unfavorite(), and Asset.is_favorited()

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- Fixed several profile properties that were broken by Roblox updates
- Caching - but it actually works

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- ``RobloxSession.friends()`` changed to ``RobloxSession.friendships()``
- RobloxSession can now be used as a context manager

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- Inventory listing with ``User.inventory()``

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- Lots of new private message functions for manipulating inboxes

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- Full Site Chat Support

- ``User.membership``
- ``Group.owner``