Merge pull request #4 from Joomla-Bible-Study/development

get in cureent development
Language work on podcast plugin

try to remove common language stuff from podcast plugin; plugin specific
phrases of the backend still keep there as there is no way to avoid
that.
Try to run the podcast generation, but fail due to a lot of changes in
the database
Merge pull request #396 from st-anton/development

Language work on podcast plugin