inital commit for signup

added a basic app using the UserCreationForm to create new user at /accounts/signup/
change outside of the app are:
-added signup to INSTALLED_APPS in /photo21/settings.py
-added accounts/signup/ to path in /photo21/urls.py

should extend UserCreationForm to have field for email and maybe first/last names, except if we want the user to add that themselves later

signup/views.py

@@ -0,0 +1,19 @@
+from django import forms
+from django.contrib.auth import login
+from django.http.response import HttpResponse
+
+
+from django.shortcuts import redirect, render
+from django.contrib.auth.forms import UserCreationForm
+from django.contrib.auth.models import User
+def signup(request):
+    if request.method == 'POST':
+        form = UserCreationForm(request.POST)
+        if form.is_valid():
+            user = form.save()
+            login(request, user)
+            return redirect('/')
+        return render(request,'signup.html', {'form':form})
+    else:
+        form = UserCreationForm()
+    return render(request,'signup.html', {'form':form})