All receives a reader from a definition file and parses it into a slice of Definition structs or returns error if an error is encounter while parsing.

IsInvalidSectionError returns a boolean indicating whether the error is reporting if a section of the definition is not a standard section.

IsValidDefinition returns whether or not the given file is a valid definition.

ParseDefinitionFile receives a reader from a definition file and parse it into a Definition struct or return error if the definition file has a bad section.

InvalidSectionError records an error and the sections that caused it.