Removing non-Bootstrap layouts. renaming bootstrap layouts to list/blog/table.
Removing version checks for Joomla 3.0.
Raising minimum requirements to Joomla 3.1.
Updates only possible for SermonSpeaker 4.5.0 and higher.
Removing migration script. Migration from SermonSpeaker 3.4.3 will go to 4.5.0 and then to 5.x
Adding renamed bootstrap layout files