Ignore npm debug files
Add 'Soft Delete' to remove records logically from DB.
Instead of issuing a "DELETE" SQL command on the database,
add a new column called 'deletedAt'.  The column is null
if the row is not deleted.  When the row is deleted,
the column is set to the date and time of the deletion.
Updated the find function to filter out non-null deletedAt
columns. Soft Delete is configured by setting the 'softDelete'
option in the adapter configuration:
{
  host: 'localhost',
  user: 'foo',
  password: 'password',
  database: 'sailspg',
  softDelete: true
}
true enables Soft Delete, false disables it.  It is set to false
by default to preserve the existing sails-postgresql semantics.
Add a test case for Soft Delete (logical delete) functionality.