fix the admin part of component

renamed admin.jake.php to jake.php to make admin portion of the component, such as documentation work  - administrator/index.php?option=com_jake&task=documentation
fix E_DEPRECATED

"Only variables should be assigned by reference" deprecation message - harder to ignore those in 5.4 as E_STRICT is now a default
couple more notices
Merge pull request #1 from drwxrwxrwt/master

few fixes to get jake to almost work