Add basic software overview page. Closes #7.

Author: tompollard

software/c.md

@@ -2,7 +2,7 @@
 layout: default
 title: C Implementation
 parent: WFDB Software
-nav_order: 1
+nav_order: 2
 ---
 
 # WFDB C Software Package

software/implementations.md

@@ -0,0 +1,31 @@
+---
+layout: default
+title: Overview
+parent: WFDB Software Implementations
+nav_order: 1
+---
+
+# Overview of the WFDB Software Implementations
+
+{: .important }
+> The are several WFDB software implementations. They include:
+
+| Implementation | | Description |
+|:--------------|:------------|
+| **WFDB C Library** | The core implementation of WFDB, optimized for speed and memory efficiency. Ideal for performance-sensitive tasks. |
+| **WFDB-Python** | A Python interface for reading, writing, and processing WFDB data. It integrates with other Python tools, offering flexibility for research and analysis. |
+| **WFDB MATLAB** | Designed for MATLAB users, providing functionality for signal processing and data analysis within the MATLAB environment. |
+
+---
+
+# Key Differences
+
+Below is an overview of how the different WFDB software implementations compare:
+
+| Feature/Functionality                | WFDB-Python | WFDB C Library | WFDB MATLAB |
+|--------------------------------------|-------------|----------------|-------------|
+| **File Reading**                     | Yes         | Yes            | Yes         |
+| **File Writing**                     | Yes         | Yes            | Yes         |
+| **Signal Processing**                | Limited     | Full           | Limited     |
+| **Data Annotation Support**          | Yes         | Yes            | Yes         |
+| **Operating System Compatibility**   | Cross-Platform | Unix-based   | Cross-Platform |

software/matlab.md

@@ -2,7 +2,7 @@
 layout: default
 title: MATLAB Toolbox
 parent: WFDB Software
-nav_order: 2
+nav_order: 3
 ---
 
 # WFDB MATLAB Toolbox

software/python.md

@@ -2,7 +2,7 @@
 layout: default
 title: Python Implementation
 parent: WFDB Software
-nav_order: 1
+nav_order: 4
 ---
 
 # WFDB Python Package