Second attempt at fixing the Velocity memory leak

1) Correct fix for Velociraptor (we need to find the DOM node and pass that in)
2) Do the same leak fix for the read marker
3) Update the dependency to our fork which is fixed to make the call we do to release memory actually work.
4) Remove the velocity-ui-pack dependency which is unnecessary because velocity-ui is included in the velocity package

src/components/views/login/RegistrationForm.js

@@ -18,7 +18,7 @@ limitations under the License.
 
 var React = require('react');
 var Velocity = require('velocity-animate');
-require('velocity-ui-pack');
+require('velocity-animate/velocity.ui');
 var sdk = require('../../../index');
 var Email = require('../../../email');
 var Modal = require("../../../Modal");