Item price column was the only column in the cart table without class
attributes.  Added class attributes to allow cart styling of the column
in the same manner that other columns can be styled.  

Removed a couple of extra spaces.

Issue #150
Unde previous (premature) commit
As discussed in #153

My suggestion is leave the 'wpsc_save_cart_item' action alone so we
don't break anything ,deprecate it.

Add a do_action('wpsc_before_save_cart_item', $cart_id, $this ) call
before the cart item record and cart meta is stored into the DB.

Add a do_action('wpsc_after_save_cart_item', $cart_id, $this ) call
after the cart item record and cart meta is stored into the DB.
leave the 'wpsc_save_cart_item' action alone so we don't break anything
,deprecate it.

Add a do_action('wpsc_before_save_cart_item', $cart_id, $this ) call
before the cart item record and cart meta is stored into the DB.

Add a do_action('wpsc_after_save_cart_item', $cart_id, $this ) call
after the cart item record and cart meta is stored into the DB.

Fixed indentation on one line 

As discussed in #154, pull request #153
Replaced wpsc_get_child_object_in_terms

More efficient query, more efficient function
Coding standards

Adjusted line breaks, parenthesis and spacing to conform to coding
standards
config file updates
renamed function
removed log file