update readme
add travis support
Update makefile build
compat with lua5.2
compat with lua5.2
support mingw
fix install module so
update makefile.win
update makefile
add luarocks support
remove unused file
add extern module
use module https://github.com/hishamhm/lua-compat-5.2
update travis
update travis
update makefile
replace \ with / in head file
fix wrong include
update test
 1. add engine test
 2. remove duplicate test
update test