improve llio + minor update to client lib
rename Llio.input_listl to Llio.input_counted_list, export Std in client_lib
fix plugin_helper export in client lib
make sure Plugin_helper is available for plugins, add a few helper
functions in Llio
rename common.ml to protocol.ml
various
expose Llio.buffer and add Llio.substring_to
Merge pull request #522 from Incubaid/llio-client-lib

improve llio + minor update to client lib