Fixed tests by making the following changes:

1. running `pod deintegrate`
2. updating `Podfile` to link with just the app target, and include the headers in the test target
3. running `pod install`
4. changing `#import <Realm.h>` to `#import <Realm/Realm.h>` in `RealmTestTests.m`
Merge pull request #1 from jpsim/master

Fixed tests