* Setting this to true will load the complete story as printed
and keep it cached between extractMetadata & getChapter in
BaseEfictionAdapter based adapters
* performLogin mostly from TrekiverseOrgAdapter
* handle 'not logged in' and 'be warned' cases
* abstracted strings to eFiction constants
* converted TrekiverseOrgAdapter to use base class
* metadata fields
* self.decode can be overriden with self.getEncoding() (@classmethod)
* made most of the methods @classmethods
* checked the eFiction source to make sure the class uses the right defaults
* added documentation
* adapted implementing classes
* works for fannation and themaplebookshop
* metadata parsing must be more extensible
* missing documentation
* proper handling of warnings / is_adult checks
* ...
