First release of Ivy.

First release. Should be productive. The code is yet quite documented. Miss some icons. ToDo :

• add Normalization of address.
• Extend components for tuple algebra (divide / add / multiple partition / multiple product)
• Extend grid algebra (divide / add / multiple partition / multiple product)
• add icons
• doc for API (via docfx ?)
• add display components for normalized grids of dim < 3