Begin to add views for part models

- List BOM items
- Show category listing as linked items
- Fix some pathing issues with InvenTreeTree class

InvenTree/part/templates/cat_link.html

@@ -0,0 +1,7 @@
+<div id="category-path" background="#99F">
+<a href="/part/list/">All</a> >
+{% for path_item in category.parentpath %}
+<a href="/part/list/?category={{ path_item.id }}">{{ path_item.name }}</a> >
+{% endfor %}
+<a href="/part/list/?category={{ category.id }}">{{ category.name }}</a>
+</div>

InvenTree/part/templates/detail.html

@@ -0,0 +1,30 @@
+<h1>Part details for {{ part.name }}</h1>
+
+{% include "cat_link.html" with category=part.category %}
+
+<br>
+Part name: {{ part.name }}
+<br>
+Description: {{ part.description }}
+<br>
+IPN: {% if part.IPN %}{{ part.IPN }}{% else %}N/A{% endif %}
+<br>
+Stock: {{ part.stock }}
+
+<br><br>
+BOM items: {{ part.bomItemCount }}<br>
+Used in {{ part.usedInCount }} other parts.<br>
+
+<h2>BOM</h2>
+<ul>
+{% for bom in part.bom_items.all %}
+<li><a href="{% url 'detail' bom.sub_part.id %}">{{ bom.sub_part.name }}</a> ({{ bom.quantity }})</li>
+{% endfor %}
+</ul>
+
+<h2>Used to make</h2>
+<ul>
+{% for p in part.used_in.all %}
+<li><a href="{% url 'detail' p.part.id %}">{{ p.part.name }}</a></li>
+{% endfor %}
+</ul>

InvenTree/part/templates/index.html

@@ -0,0 +1,27 @@
+<h1>Parts page!</h1>
+
+{% if category %}
+{% include "cat_link.html" with category=category %}
+<h3>Child categories</h3>
+<ul>
+{% for child in category.children.all %}
+<li><a href="/part/list?category={{ child.id }}">{{ child.name }}</a></li>
+{% endfor %}
+</ul>
+{% else %}
+No category!
+{% endif %}
+
+<b>Here is a list of all the parts:</b>
+
+
+
+<table>
+{% for part in parts %}
+<tr>
+    <td><a href="{% url 'detail' part.id %}">{{ part.name }}</a></td>
+    <td>{{ part.description }}</td>
+</tr>
+{% endfor %}
+</table>
+