v0.2.0

• Assume algebras form a group under addition
• Added algebras to hmlie under this assumption
• Changed unserialize op from static method to void editing data in place.
• Added unserialize to all lie groups
• Added get_size to all lie groups
• Changed action signature from (g, M) -> (M) to (G, M) -> (M)
• Removed left_exp_default action
• Added left_product action
• Added coordinate map to MK flow
• Changed SU serialization to not assume quaternion format
• Generalized SU(n) to n -> inf