Added table with links and descriptions.

Fixesfaif#53.

Author: dsoprea

README.md

@@ -8,32 +8,34 @@ rerun `append_output.sh` to keep the output comments at the bottom up to date.
 
 Current Patterns:
 
-* 3-tier
-* abstract_factory
-* adapter
-* borg
-* bridge
-* builder
-* catalog
-* chain
-* command
-* composite
-* decorator
-* facade
-* factory_method
-* flyweight
-* graph_search
-* iterator
-* mediator
-* memento
-* mvc
-* null
-* observer
-* pool
-* prototype
-* proxy
-* publish_subscribe
-* state
-* strategy
-* template
-* visitor
+| Pattern | Description |
+|:-------:| ----------- |
+|[3-tier](3-tier.py)| data<->business logic<->presentation separation (strict relationships) |
+|[abstract_factory](abstract_factory.py)| use a generic function with specific factories |
+|[adapter](adapter.py)| adapt one interface to another using a whitelist |
+|[borg](borg.py)| a singleton with shared-state among instances |
+|[bridge](bridge.py)| a client-provider middleman to soften interface changes |
+|[builder](builder.py)| call many little discrete methods rather than having a huge number of constructor parameters |
+|[catalog](catalog.py)| general methods will call different specialized methods based on construction parameter |
+|[chain](chain.py)| apply a chain of successive handlers to try and process the data |
+|[command](command.py)| bundle a command and arguments to call later |
+|[composite](composite.py)| encapsulate and provide access to a number of different objects |
+|[decorator](decorator.py)| wrap functionality with other functionality in order to affect outputs |
+|[facade](facade.py)| use one class as an API to a number of others |
+|[factory_method](factory_method.py)| delegate a specialized function/method to create instances |
+|[flyweight](flyweight.py)| transparently reuse existing instances of objects with similar/identical state |
+|[graph_search](graph_search.py)| (graphing algorithms, not design patterns) |
+|[iterator](iterator.py)| structure repeated, identical calls as a generator |
+|[mediator](mediator.py)| an object that knows how to connect other objects and act as a proxy |
+|[memento](memento.py)| generate an opaque token that can be used to go back to a previous state |
+|[mvc](mvc.py)| model<->view<->controller (non-strict relationships) |
+|[null](null.py)| (no clear use in modern Python) |
+|[observer](observer.py)| provide a callback for notification of events/changes to data |
+|[pool](pool.py)| preinstantiate and maintain a group of instances of the same type |
+|[prototype](prototype.py)| use a factory and clones of a prototype for new instances (if instantiation is expensive) |
+|[proxy](proxy.py)| an object funnels operations to something else |
+|[publish_subscribe](publish_subscribe.py)| a source syndicates events/data to 0+ registered listeners |
+|[state](state.py)| logic is org'd into a discrete number of potential states and the next state that can be transitioned to |
+|[strategy](strategy.py)| selectable operations over the same data |
+|[template](template.py)| an object imposes a structure but takes pluggable components |
+|[visitor](visitor.py)| invoke a callback for all items of a collection |