updated README and pyproject descriptions

Author: keithalegrand

README.md

@@ -1,9 +1,12 @@
-![pyest_logo](./docs/image/pyest_logo.png)
+![pyest_logo](https://github.com/scope-lab/pyest/blob/main/docs/image/pyest_logo.png?raw=true)
 
 # PyEst: Adaptive Gaussian Mixture State Estimation
 
 [![Python application](https://github.com/scope-lab/pyest/actions/workflows/pythonapp.yml/badge.svg)](https://github.com/scope-lab/pyest/actions/workflows/pythonapp.yml)
 
+> **Not pytest**: PyEst is a Python library for **adaptive Gaussian mixture state estimation**.
+> For the Python test framework, see [pytest](https://pytest.org).
+
 ## Basic Usage
 
 Import the `gm` module of PyEst as well as numpy and matplotlib

pyproject.toml

@@ -23,6 +23,16 @@ dependencies = [
 ]
 readme = "README.md"
 requires-python = ">=3.9"
+keywords = [
+    "state estimation",
+    "uncertainty propagation",
+    "Gaussian mixture",
+    "nonlinear estimation",
+    "Bayesian filtering",
+    "negative information",
+    "Gaussian splitting",
+    "target tracking",
+]
 license = "MIT"
 license-files = ["LICEN[CS]E*"]