rename Bin to Bit
update readme
add bit commands support; remove score_cast_func, we only support int64
add some api describtion for the bit type
add bitmap commands support for openresty(lua)
UPPER case of Commands
parseint bitsize is 8
update doc
problem of incorrect bit count within specified pos range is solved; corret itoperation return value
update read me
add some test for the bit type
Merge branch 'develop' of https://github.com/siddontang/ledisdb into develop
update read me
Update command documents,

Add missing bitmap commands
update read me
Update README.md
delete temporary file
fix bitmap test
fix unprintable character
add select display support; plus the -n flag in command line parameter