docs update

Author: egil

README.md

@@ -24,6 +24,11 @@ var diffs = DiffBuilder
 
 Read more about the available options on the [Diffing Options/Strategies](/docs/Strategies.md) page.
 
+# Documentation
+- [Diffing Options/Strategies](/docs/Strategies.md)
+- [Creating custom diffing options/strategies](/docs/CustomStrategies.md)
+- [Difference engine internals](/docs/DifferenceEngineInternals.md)
+
 ## Acknowledgments
 Big thanks to [Florian Rappl](https://github.com/FlorianRappl) from the AngleSharp team for providing ideas, input and sample code for working with AngleSharp. 
 

docs/DiffingEngineInternals.md

@@ -1,4 +1,4 @@
-# Difference engine details
+# Difference engine internals
 The heart of the library is the `HtmlDifferenceEngine` class, which goes through the steps illustrated in the activity diagram below to determine if the control nodes is the same as the test nodes.
 
 The `HtmlDifferenceEngine` class depends on three _strategies_, the `IFilterStrategy`, `IMatcherStrategy`, and `ICompareStrategy` types. These are used in the highlighted activities in the diagram. With those, we can control what nodes and attributes take part in the comparison (filter strategy), how control and test nodes and attributes are matched up for comparison (matching strategy), and finally, how nodes and attributes are determined to be same or different (compare strategy).

docs/Strategies.md

@@ -263,7 +263,7 @@ To configure/override whitespace rules on a specific subtree in the comparison,
 **NOTE:** It is on the issues list to deal with whitespace properly inside `<style>` and `<script>`-tags, e.g. inside strings.
 
 #### Perform case-_insensitve_ text comparison
-To compare the text in two text nodes to each other using a case-insensitive comparison, call the ``WithTextComparer(WhitespaceOption, ignoreCase: true)` method on a `DiffBuilder` instance, e.g.:
+To compare the text in two text nodes to each other using a case-insensitive comparison, call the `WithTextComparer(WhitespaceOption, ignoreCase: true)` method on a `DiffBuilder` instance, e.g.:
 
 ```csharp
 var diffs = DiffBuilder