fix module system bug that dependency does not resolved correctly
change poller exception name Poller to poller
fix for luact.pbuf
fix deactivate_write can not be called twice
fix bug of exclusive mode
now io:wait_read/wait_write returns false if it terminated by calling io:close.
check return value of io:wait_read/write and do correct cleanup
socket.getifaddr: fallback to lo0 when default en0 or eth0 not available (offline mode)
exception.new: autometically add stacktrace
generics.mutex_ptr: fix bug when error occurs during touch contents
make exception tranferrable
fix bug of get if addr always use last interface candidate
fix travis build
Merge pull request #19 from umegaya/umegaya/feature/new_linda

Umegaya/feature/new linda LGTM