Fix for #219: binding named parameters broken

This is a combination of 20 commits:
added cache callback #212

added test

Added text for custo...

Restrict null primary keys on update/delete, resolves #203

offsetExists() should return true for null values, resolves #181

Fix bindParams to bindParam

Fix for parameter types.

Only make integers type int, all other number types get passed as
strings.

where_id_in() for selecting multiple records by primary key

Multiple OR'ed conditions support

Correct issue #176: Ensure database setup before building select

Multiple OR'ed conditions
-------------------------

You can add simple ORed conditions to the s...

Also, now they allow multiple column-names per call.

Also, now they allow multiple column-names per call.

Added debug code to see why it's failing.

Added some more debug code.

Fixed the regex not having backslashes escaped.

Remove some empty results from the array before checking.

Updated regex to disregard placeholders within quotes.

Changed some debugging code.

Fixed regex issue that caused almost all tests to fail.

Updated preg_match_all parameters.

Testing:
Checks the parameter array to ensure the correct number of values inside
the parameter ...

Conflicts:
idiorm.php

Improving typecasting for aggregate db functions

Now that HHVM can run your projects, lets keep it that way

Changed configure() to directly set $_config
Fixed typo on comment ('mulitple' -> 'multiple')