Version 7.0.0rc0

• Adding #169 default functions with the box_instance and key parameter (thanks to Коптев Роман Викторович)
• Adding #170 Be able to initialize with a flattened dict - by using DDBox (thanks to Ash A.)
• Adding #192 box_dots treats all keys with periods in them as separate keys (thanks to Rexbard)
• Adding #211 support for properties and setters in subclasses (thanks to Serge Lu and David Aronchick)
• Adding #226 namespace to track changes to the box (thanks to Jacob Hayes)
• Adding #236 iPython detection to prevent adding attribute lookup words (thanks to Nishikant Parmar)
• Adding #238 allow | and + for frozen boxes (thanks to Peter B)
• Adding new DDBox class (Default Dots Box) that is a subclass of SBox
• Fixing #235 how | and + updates were performed for right operations (thanks to aviveh21)
• Fixing #234 typos (thanks to Martin Schorfmann)
• Fixing no implicit optionals with type hinting