Real-time pulling for new ads
Merge branch 'master' of git@github.com:aluong91/cse190.git

Conflicts:
	src/com/example/bidit/ImagePagerActivity.java
Ad.java - Deleted Bitmap image field and implemented the Parcelable
interface
BidDialogFragment.java - Check bid price to make sure it's higher than
minimum price.
ImagePagerActivity - ImagePagerAdapter is saved when orientation changes
so that it can be reused.