v0.10.0

• Added #[rename] attribute to rename any table or column to be different from
  the Rust struct or field.
• Optimized migrations to never load all rows at once.
• Fixed a bug where a custom primary key name was not used when decorrelating nested queries.
• Fixed a migration bug with custom primary keys.
• Fixed missing unraw on column and struct names (the r# prefix would previously be kept).

Breaking

• Changed TransactionMigrate::migrate_optional to return MigratedOptional.

  • Migrated::map_fk_err is replaced by MigratedOptional::map_fk_err.
  • Schema generic is removed from Migrated type.
  • Changed generics on TransactionMigrate methods to the new table type.

• Added TransactionScope to handle mutable table rows without a Drop impl.
  This means that the Mutable type will now automatically have a non lexical lifetime, which
  makes it easier to use.

  • The Transaction::mutable and Transaction::mutable_vec have moved to TransactionScope.
  • Mutable::into_table_row is renamed to Mutable::table_row and takes self by reference.