Added more property help docs

app/private/docs/property/slot.md

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+# Slots
+
+Slots are the main way creatures interact with libraries. A slot can be filled by choosing a property from a library that fits that particular slot.
+
+In a complete library, a creature can be built entirely by choosing which properties to fill each slot with.
+
+Slots show up on the build tab, and are highlighted when they have space that can be filled.
+
+If you are building a creature without a library, you should either ignore slots entirely, or fill them with your own custom properties.
+
+---
+
+### Name
+
+The name of the slot.
+
+### Type 
+
+What kind of property this slot expects to fill it.
+
+### Tags required
+
+Properties in a library must have the required tags to fill the slot.
+
+### Quantity
+
+How many properties are expected to fill this slot. Use 0 for allowing an unlimited number of properties.
+
+### Condition
+
+A [computed field](/docs/computed-fields) that determines whether this slot can accept new properties.
+
+### Unique
+
+The slot can control how it deals with the uniqueness of properties that fill it.
+
+### Description
+
+A detailed description of the attribute.
+
+Allows [inline calculations](/docs/inline-calculations).
+
+### Hide when full
+
+When set the slot will hide itself when it is filled.
+
+### Ignored
+
+When set the slot will not show a prompt card on the build tab.
+
+### Tags
+
+See [Tags](/docs/tags)