A totally new implement of bufflib

[starwing]

Hi, I have made a new bufflib implement, maybe have something inspired, some major different points are:

• offer a header to makes other C client can use library (mainly for 5.1/5.2 compat)
• use malloc/realloc/free instead of lua_newuserdata, use gc metamethod.
• some name of API changed, addsep -> addwithsep (maybe 'join' is better?)
• some API added, addpart to add a part of string to buffer, and part to get part of buffer.
• no s_ prefix for standard string module.

the source is here: https://gist.github.com/starwing/5876042

Regards,
Xavier Wang

[Choonster]

Very interesting, I'll have to have a look at it.