Update documentation

Author: bailuk

README.md

@@ -6,7 +6,7 @@
 GTK 4 bindings for Java.
 It uses [Java Native Access (JNA)](https://github.com/java-native-access/jna) to access GTK libraries. 
 
-[![POC screenshot](screenshot.png)](examples/src/main/java/examples/ImageBridge.java)
+[![POC screenshot](doc/screenshot.png)](examples/src/main/java/examples/ImageBridge.java)
 
 ## Example
 

doc/overview.html

@@ -5,8 +5,8 @@
 <p>
     <ul>
         <li><a href="https://github.com/bailuk/java-gtk">GitHub source repository</a></li>
-        <li><a href="https://github.com/bailuk/java-gtk/doc/concepts.md">Concepts of java-gtk</a></li>
-        <li><a href="https://github.com/bailuk/java-gtk/doc/windows.md">Using java-gtk on Windows</a></li>
+        <li><a href="https://github.com/bailuk/java-gtk/blob/main/doc/concepts.md">Concepts of java-gtk</a></li>
+        <li><a href="https://github.com/bailuk/java-gtk/blob/main/doc/windows.md">Using java-gtk on Windows</a></li>
     </ul>
 </BODY>
 </HTML>

screenshot.png renamed to doc/screenshot.png

@@ -1,4 +1,6 @@
-# Install GTK libraries
+# Using java-gtk on Windows
+
+## Install GTK libraries
 
 See [Setting up GTK for Windows](https://www.gtk.org/docs/installations/windows)
 
@@ -11,7 +13,7 @@ pacman -S mingw-w64-x86_64-libadwaita
 3. Add `C:\msys64\mingw64\bin` to PATH
 
 
-# Build and run sample
+## Build and run sample
 
 ```PowerShell
 git clone https://github.com/bailuk/java-gtk.git
@@ -21,17 +23,17 @@ cd java-gtk
 .\gradlew.bat run
 ```
 
-# Trouble shoot
+## Trouble shoot
 
-## Alternative names
+### Alternative names
 
 GTK for Windows has a different naming schema for libraries than assumed by default.
 Default library names are configured in [Configuration.kt](../generator/src/main/kotlin/ch/bailu/gtk/Configuration.kt).
 Alternative names are configured in [loader.properties](../java-gtk/src/main/resources/jna/loader.properties).
 More alternative names can be added programmatically during runtime: [Loader.java](../java-gtk/src/main/java/ch/bailu/gtk/lib/jna/Loader.java).
 
 
-## Windows library load order
+### Windows library load order
 
 Windows library (dll) search paths:
 - Current directory
@@ -40,29 +42,29 @@ Windows library (dll) search paths:
 - Windows PATH variable
 
 
-## Related and useful system properties (Java and JNA)
+### Related and useful system properties (Java and JNA)
 
 ```Java
 System.setProperty("jna.debug_load", "true");
 System.out.println(System.getProperty("java.library.path"));
 System.out.println(System.getProperty("jna.library.path"));
 ```
 
-## JNA library load order
+### JNA library load order
 
 1. `java.library.path`
 2. `jna.library.path`
 3. Resource path: JAR or `build\classes\java\main`
 
-## Dependencies
+### Dependencies
 
 DLLs depend on other DLLs. In this case linking is done by the Windows OS and not by JNA.
 To check dependencies, run ldd from WinGW Terminal: `ldd library-to-check.dll`
 
 DLLs loaded by JNA must be identical (same file, not a copy) with DLLs loaded by Windows.
 
 
-## Naming
+### Naming
 
 lib[name]-[major]-[minor].dll