Made CMusicDatabase::CreateTables little more readable
Added CMusicDatabase::CreateTriggers()
Added CMusicDatabase::CreateIndexes()
Altered CMusicDatabase::CreateViews() to remove unnecessary drops
Altered CMusicDatabase::UpdateOldVersion to remove unnecessary analytics changes
Cleaned tab symbols from the sqlitedataset.cpp
Added drop_extras() to CDatabase and its ancestors
Aligned CDatabase::Update to call appropriate database::drop_extras() after successful copy