1. add timer. (to be continue.)
1. add util
2. add lib and gtest
1. add clock
2. add cond
3. add context
4. add utime
5. complete timer
1. finish feature of timer
2. compile and link ok
3. test basic function of timer ok
1. add new file
1. remove odd files
1. finish feature of disk initial
2. test basic function of disk initial ok
Merge branch 'master' into wip-stream-map

Conflicts:
	test/logger_test.cc
Merge branch 'master' into wip-stream-map
1. add options analyze
2. add config file analyze
3. change dir of makefile
1. delete .o and .d files
shell:
1. fallocate files ok
disk formate
1. change fallocate file name
2. modify debug information
一. shell
1. fallocate index file

二. util
1. add doc
2. change struct of stream
util
1. change namespace storage to util
2. add .cc of cond
1. add json config file
1. add readme and streammgmt.json
add new files
1. change the name of storage.json to storage_server.json
2. use online tool to check storage_server.json
1. fo