v0.5.3 adjust default setting for index row

user should add skin_index_row to configuration
value could be setted from 0 to 9999
if skin_index_row not declared adjust by default to 2 rows and 6 columns

if set to 0 adjust to 12 columns and no paging (just scroll till the end
of movies)
if set to 1 or 2 , 2 rows and 6 columns (12 posters)
if set to 3 , 3 rows and 9 columns (27 posters)
if set to 4 , 4 rows and 10 columns (40 posters)
if set to 5, 5 rows and 12 columns (60 posters)
if set >= 6 ,  12 columns  (x*12 posters)