update documentation for version 0.2.1
adjusted download sizes
Merge branch 'gh-pages' of git@github.com:zussel/oos.git into gh-pages

Conflicts:
	api/classoos_1_1attribute__counter.html
	api/classoos_1_1attribute__reader.html
	api/classoos_1_1attribute__writer.html
	api/functions_func_r.html
	api/functions_func_w.html
	api/functions_o.html
	api/functions_r.html
	api/functions_rela.html
	api/functions_w.html
	download.html
	index.html