bugfix : concat string
abandon undefined field in decode
use old style __gc in userdata for collect unused pattern
bugfix : unpack array
delete env on exit
default cache don't need set to weak table
bugfix: adjust packed varint length
Update README.md
Merge pull request #13 from Atry/patch-1

Update README.md
bugfix: check unknown field wire type
Merge branch 'master' of github.com:cloudwu/pbc
fix warning
Create VS2012 project
replace typename to type_name, conflict with C++ keyword
VS2012 can't #include <stdbool.h>
void* p cast to (TYPE*)p
strtoll
http://connect.microsoft.com/VisualStudio/feedback/details/758053/missing-strtold-strtoll-strtoull-functions-from-stdlib-h
http://stackoverflow.com/questions/7502926/what-is-atoi-equivalent-for-64bit-integeruint64-t-in-c-that-works-on-both-unix
disable C4146
http://msdn.microsoft.com/library/vstudio/4kh09110
change "char temp[len]" to "char* temp = (char*)malloc(len)", VS2012 not support C99
LNK4006