multiconfig: initial implementation of validators
Multiconfig: another attempt at implementing validators
Config: add working validator implementation
Multiconfig: add documentation
Multiconfig: integrated Validator into DefaultLoader
Multiconfig: fix wording
Multiconfig: added parent field names into nested structs' error string
Multiconfig: called MustValidate in the MustLoad.
Multiconfig: move multivalidator to its own file
Multiconfig: rename NewValidator
Multiconfig: added MustLoad method
Merge pull request #15 from koding/validator

Validator