Update readme.md

Author: marcomilon

README.md

@@ -9,7 +9,7 @@ gStatic uses Go’s html/template and text/template libraries as the basis for t
 - [x] Parse a yaml files and replace variables on the template
 - [x] Write result to a public folder
 - [x] Add support for layouts
-- [ ] Improve error handling
+- [x] Improve error handling
 - [ ] Add configuration
 - [ ] Add documentation on how to do templates