update Libevent packege from 'stable' based to 'master'.
success to compile
patch from 'stable_libevent_socket'
confirmed in 'stable_libevent_socket' but 'master' occurs error.
add KRefTrace() and KField{Init,Set}() macro for GC
correct import package name
don't use heap for struct timeval
fix to use 'K_NULL' in KFieldInit(), KFieldSet() macros
Merge pull request #385 from tosnoz/libevent_package

Libevent package pull request
first commit
success if and function call
fixed if statement
fixed dollar reference
fixed dollar
success while and if statement
add Bash test
fixed Bash.c
modified
bash.patch
vm exchange
fixed local variable
fixed VisitNull