remove old benchmarks, update readme

README.md

@@ -3,3 +3,25 @@
 [![](https://img.shields.io/badge/docs-latest-blue.svg)](https://itsdfish.github.io/ACTRModels.jl/dev/)
 
 The goal of ACTRModels.jl is to provide basic types and functions for developing models based on the [ACT-R](https://en.wikipedia.org/wiki/ACT-R) cognitive architecture. Please see the documentation for installation instructions, working examples, and related pacakges.  
+
+
+# Simple Example 
+
+```julia 
+using ACTRModels
+
+# create chunks of declarative knowledge
+chunks = [Chunk(; name = :Bob, department = :accounting),
+    Chunk(; name = :Alice, department = :HR)]
+# initialize declarative memory
+declarative = Declarative(memory = chunks)
+
+# specify model parameters: partial matching, noise, mismatch penalty, activation noise
+Θ = (mmp = true, noise = true, δ = 1.0, s = 0.20)
+
+# create an ACT-R object with activation noise and partial matching
+actr = ACTR(; declarative, Θ...)
+
+# retrieve a chunk
+chunk = retrieve(actr; department = :accounting)
+```