Add assign_to
Implement from_value
Replace assign_to with adapter_traits::to
Refactor a couple of value/adapter methods
Fix header guards
Improve comments
Cleanup
Reimplement ssi directives as faster builtin_tags
Add future work
Add comments
Delete incomplete header
Cleanup
Add from_arguments overload
Change positional component from list to tuple
Add python filter to test
Bump minor version