Filled out reference index and added placeholders for assertions and logging docs

docs/assertions.md

@@ -0,0 +1,5 @@
+placeholder for assertion macros
+
+---
+
+[Home](../README.md)

docs/logging.md

@@ -0,0 +1,5 @@
+placeholder for logging docs
+
+---
+
+[Home](../README.md)

docs/reference-index.md

@@ -1,4 +1,11 @@
-placeholder for reference index
+These are the currently documented areas of the framework. There is more to come.
+
+Before looking at this material be sure to read the [tutorial](tutorial.md)
+
+[Command Line](command-line.md)
+[Assertion Macros](assertions.md)
+[Logging Macros](logging.md)
+[Supplying your own main()](own-main.md)
 
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