add readme.txt
aclang lexer & test codes
add keywords
add keywords
add acVariable
add gc
add mark&sweep gc
add gc
fix gc
fix gc
add test_gc.cpp
fix gc
remove refcount
use clock() to limit the time spent on GC per cycle
add hash() for acTableKey
add MurmurHash3 for hashing string
move files to their respective folders
add CMake build system
do not show setpath info
add GC FINAL state