more TODO
Update README.md
Describe automatic logging of parsing and rendering errors
Nil input (template string, resource name, file path, URL) all have GRMutache return errors (fixes #56)
v6.7.5
Rendering nil NSString returns a GRMustacheErrorCodeTemplateNotFound error instead of a GRMustacheErrorCodeParseError.
FAQ: Is it possible to provide literal values in tags, or as filter arguments?
Revert "FAQ: Is it possible to provide literal values in tags, or as filter arguments?"

This reverts commit dad544d6371aa2003f35f85343290dbcf85854e9.
More TODO
Remove useless forward declaration
Typo
importXXX methods WIP
Typo
Prepare v6.8
v6.8.0
Typo
Typo
Fix documentation
More visible links to Guides from the Reference
Add missing tests for mustacheTag:didRenderObject:as: and mustacheTag:didFailRenderingObject:withError: