Changing the error message thrown when 'value' is called on an absent value.
Remove quotes from getter in error messages.
Merge pull request #101 from fniemann/optional_error_message

Changing the error message that is thrown when value is called on an absent Optional.
Add partition(iterable, size).
Merge pull request #100 from cbracken/add-partition

Add partition(iterable, size).
Add trimLeft and trimRight
Bump version to 0.18.0. Update README.