Add checking function whether in the directory or not
Add guard condition to avoid flycheck if in Go's directory
Add checker function whether Go's package or not
Update my/go-packages variable before saving
Add guard condition for go's auto-complete
Add popwin configuration for godoc
Reset go-mode-hook to use my ac-sources
M-. -> M-j
Use start-process instead of async-shell-command
Don't display minibuffer message of flycheck
Define my default ac-sources
Use my/ac-sources-default variable
Fix go's ac configuration to use other source