Support standard naming conventions for databases

[nsjames]

Right now we are using emplace, modify, and erase for the manipulation of rows in multi_index tables.

Since we are expecting multi_index to be used in a similar way to a database within smart contracts, it would be easier for developers to get started with Antelope if our nomenclature mimicked that of other databases they are familiar with (like MySQL, Postgre, MongoDB, SQLite, etc) and had alias support for:

• Insert
• Update
• Delete

I think that the understandability and memorability of our language would improve for anyone who doesn't come from C++, Rust, or D.

users.insert(ram_payer, [&](auto& row){ ... });
users.update(user, ram_payer, [&](auto& row){ ... });
users.delete(user);

[mikelik]

@nsjames delete is a restricted keyword in C++ and cannot be used. May I use remove instead?

[mikelik]

Added insert, update and remove

[nsjames]

Heyy, I didn't even notice this. That's awesome 🔥