Update README.md for v0.1.3

Update README.md to document v0.1.2 features and enhancements

Update README.md to include version 0.1.0 features

Update README.md to include v0.0.5 features

Update README.md for v0.0.4

Update README.md for v0.0.3

Fix ManagedException to ensure error list contains only strings; add …

…unit tests for Logger and ManagedException

full coverage on reachable code