Upgrade dependencies to react 15

[ThariqS]

Tests and examples seem to work on my end.

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[ThariqS]

I signed it!

[jwngr]

Thanks for sending this along. You also need to update the bower.json dependency. Also, can you update the React version for all the examples in the /examples directory?

[googlebot]

CLAs look good, thanks!

[ThariqS]

Just added the bower.json and examples!

[deavial]

any updates on when this will be pushed? thanks

[jwngr]

Looks good! Thanks for the contribution! I'll get a new version of ReactFire (0.7.0) out within the hour.

[jwngr]

ReactFire 0.7.0 is out! Thanks again!