Add -o option in the help

Well, that's what I call a *small* change.
Update .gitignore to match the new binaries
Add current state to dislocker's context

A macro is used to update the current state during the initialization.
At the end of dis_initialize(), the current state should be the stop_at
state.
Add verbosity flag to dislocker-metadata

This flag just changes the default verbosity level, from L_INFO to
L_DEBUG.