Support DELETE

[thiagodp]

AFAIK, database-js-ini does not support DELETE commands yet. One problem is probably the syntax.

Thus, I would like to suggest a syntax for that:

Delete from the ROOT

DELETE FROM ROOT

would remove all the sections and keys from the file.

Delete a section

DELETE FROM `my section`

would remove the section "my section".

DELETE FROM `my section` WHERE max < 100

would only remove the section "my section" if "max" is less than 100.

Notes

• Keys can be removed with the UPDATE method, setting their value to NULL.
  For example:

  UPDATE `my section` SET max = null WHERE max < 100

  would remove the key "max" if its current value is less than 100.