add apis and complete docs
modify doc formats
modify doc formats
fix some mem leak
update README.md
update README.md
Merge pull request #1 from chzyer/feature/add_gist

Feature/add gist
format change
format change
fix tab format
fix tab format
fix_batch_bugs_and_add_batch_tests
fix Makefile
add Qiniu_Free, and replace the satify free with Qiniu_Free
Merge pull request #85 from carter2000/feature/b_jwl_add_Qiniu_Free

add Qiniu_Free, and replace the satify free with Qiniu_Free
Update CHANGELOG.md
init PutRet and check null before print it
Merge pull request #88 from carter2000/feature/b_jwl_fix_uninitialised_PutRet

init PutRet and check null before print it
cast time_t to uint32 and print it with %u
use unsigned int