Documentation updates

Use "encoder-decoder" rather than "encoder / decoder".

Minor limitations clarifications.

* Readme and copyright updates

* Small documentation fixes

---------

Co-authored-by: Laurence Lundblade <lgl@securitytheory.com>
diff --git a/test/run_tests.h b/test/run_tests.h
index ce44673..6790710 100644
--- a/test/run_tests.h
+++ b/test/run_tests.h
@@ -60,7 +60,7 @@
 
 
 /**
- @brief Print sizes of encoder / decoder contexts.
+ @brief Print sizes of encoder-decoder contexts.
 
  @param[in] pfOutput     Function that is called to output text strings.
  @param[in] pOutCtx      Context pointer passed to output function.