change README

README

@@ -10,7 +10,10 @@ Chinese language: http://www.csource.org/
 c common functions library extracted from my open source projects FastDFS and 
 FastDHT. this library is very simple and stable.
 
-function including:
+some functions are wrappered into php extension, such as fastcommon_gethostaddrs,
+     fastcommon_id_generator_xxx, fastcommon_get_ifconfigs, fastcommon_get_sysinfo etc.
+
+C function including:
   logger: [logger.h] asynchronously sync to disk for high performance, thread safe,
           log rotate, auto delete old log files, compress log file etc.
 
@@ -23,6 +26,8 @@ function including:
           support control statements for special purpose as:
               #@if, #@else, #@endif, #@for, #@endfor
 
+  id generator: [id_generator.h] generate unique 64 bits integer ID for multi processes
+
   string operation: [shared_func.h] uppercase, lowercase, trim etc.
 
   base64 encode / decode: [base64.h] for standard base64 or variable base64
@@ -64,5 +69,7 @@ function including:
 
   task schedule: [sched_thread.h] task shedule management/thead for repeat tasks
 
+  char convert: [char_converter.h] and [char_convert_loader.h] for fast char convert
+
 detail info please see the c header files.