[SalesForce] Cannot read property ‘navigateToSObject’ of undefined in Lightning

I am developing a Lightning component that lists related Contacts. I would like to make it so that when you click on the name of a related contact, then it will navigate to that contact's record. Here is the component:

<aura:component implements="force:appHostable">
     <aura:attribute name="RelatedContact" type="Contact"/>
     <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
     <ui:outputText value="{!v.RelatedContact.Name}" click="{!goToContact}"/>
 </aura:component>

In my controller I have the method goToContact as follows

goToContact : function(component, event, helper) {
    sforce.one.navigateToSObject(component.get("v.RelatedContact.Id"));
}

and the method doInit as follows

doInit : function(component, event, helper){
    var head = document.getElementsByTagName('head')[0];
    var script = document.createElement('script');  
    script.src = "/soap/ajax/32.0/connection.js"; 
    script.type = 'text/javascript';
    script.key = "/soap/ajax/32.0/connection.js"; 
    script.helper = this;
    script.id = "script_" + component.getGlobalId();
    head.appendChild(script);

    var script2 = document.createElement('script');
    script2.src = "/soap/ajax/32.0/apex.js"; 
    script2.type = 'text/javascript';
    script2.key = "/soap/ajax/32.0/apex.js"; 
    script2.helper = this;
    script2.id = "script2_" + component.getGlobalId();
    head.appendChild(script2);
},

Everything appears to load properly, however, when I click on the name a pop up gives me this message

Something has gone wrong. Cannot read property 'navigateToSObject' of undefined.
Please try again.