Merge pull request #3 from EpsilonX/song

Merge with Song
add content for sites
add lib for json
add code to read top sites
able to put data
fix some bugs, but still some remains
unable to find memory increasing for server
fix a bug in simple store
fix destructor of SimpleStore
add command line option
add time for test
on fixing bug
update simple data block and some interface
fix size growing bug
fix some known bug and fix the interface
merge
fix a bug in Store
Merge branch 'master' of github.com:mfight/squash-key-value into song
fix bugs of simple store
Merge branch 'master' of github.com:mfight/squash-key-value into song