My Collection - Release 1.3.6

I've spent some time wiring up the preferences system for the activity. So far, I have two basic preferences. One for showing/hiding tabs, and another to set the default tab.

Changes:

1. Added preferences menu for show/hide tabs and setting default tab.
   

Remaining 1.3.* TODO:

1. Do on long click menus for items to do quick loan and delete
   
2. Figure out the UK lookup issue. I've finally got some people in the UK to send me barcodes
3. Wishlist?