Add a button to change page size, fix pagination

Add a button to change the pin size.
Change a little the layout.
Fix pagination in some cases.
Edit pins: add search form
Edit pins: search pins
Edit pins: paginate and click to edit
Edit pin: show edit form
Edit pin: save changes
Edit pin: preserve rearches
Add google image search results with title and description
Update settings.py
Merge pull request #94 from camilotorresf/pin-loaders

Edit pins in admin and little fix to uploaded items in /admin/input/
Merge pull request #95 from oakoval/live

Add google image search results with title and description
Edit pin: allow pin deletion
Merge pull request #96 from camilotorresf/pin-loaders

Edit pin: allow pin deletion
More button
Merge
Merge pull request #97 from OlegYarosh/live

Progress for last week
Merge branch 'live' of github.com:mygetlist/pin into live
Fixed bug in pins template