Update to version 5.11.0

• 5.11.0 2015/03/31

Extend get_org_info (snippets) to return original string YAZ-836
Two new functions have appeared: icu_chain_get_org_info2 and
icu_iter_get_org_info2 with a 4th parameter being a pointer
to the original string.

Fix tcpip.c compilation failure on VC9 YAZ-835

Fix icu_iter_get_norm returns invalid size for some input YAZ-834
The icu_iter_get_org_info returns information based on string
as it appears on tokenize step.